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US2283897A - Antenna system - Google Patents

Antenna system Download PDF

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Publication number
US2283897A
US2283897A US270173A US27017339A US2283897A US 2283897 A US2283897 A US 2283897A US 270173 A US270173 A US 270173A US 27017339 A US27017339 A US 27017339A US 2283897 A US2283897 A US 2283897A
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US
United States
Prior art keywords
conductors
antenna
radiators
antennae
point
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US270173A
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English (en)
Inventor
Alford Andrew
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Internat Telephone & Radio Manufacturing
International Telephone & Radio Manufacturing Corp
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Internat Telephone & Radio Manufacturing
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to NL64189D priority Critical patent/NL64189C/xx
Application filed by Internat Telephone & Radio Manufacturing filed Critical Internat Telephone & Radio Manufacturing
Priority to US270173A priority patent/US2283897A/en
Priority to GB4095/40A priority patent/GB538036A/en
Priority to FR864920D priority patent/FR864920A/fr
Priority to US403519A priority patent/US2306113A/en
Application granted granted Critical
Publication of US2283897A publication Critical patent/US2283897A/en
Priority to CH292838D priority patent/CH292838A/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
    • G01S1/02—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using radio waves
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop

Definitions

  • My invention relates to antenna systems particularly for use with plane polarized waves.
  • radiators have been tried experimentally but it has been demonstrated that none of these radiators operates to radiate exclusively horizontally polarized waves ⁇
  • the radiator consisted of two horizontal half-Wave dipoles crossed, that is, arranged at right angles to each other.
  • an antenna system which substantially eliminates all of the vertically polarized wave components of a received or transmitted wave. This is accomplished by dimensioning the antenna and so energizing it that the vertically polarized components of a wave will be substantially neutralized in every direction from the antenna.
  • a further object of my invention is to provide a radiating or receiving antenna which will have a radiant action substantially only for plane polarized waves forming substantially 9. circular radiation pattern in the plane of polarization.
  • ItA is a still further object of my invention to provide a'receiving system for plane polarized waves utilizing a receiving antenna subject to reception of only waves polarized in the pla'ne of the antenna.
  • FIG. 1 illustrates in plan view one form of antenna constituting an embodiment in accordance with the principles of my invention
  • Fig. 2 illustrates in plan view one form of constructive arrangement of the antenna of Fig. 1;
  • Fig. 3 illustrates in plan view a modification of the antenna arrangement of Fig. 1 utilizin only one loop conductor
  • Fig. 4 illustrates a modied antenna structure embodying the principles of my invention
  • Figs. 5 and 6 show a plan view and elevational view, respectively, of a practical constructive embodiment of the antenna illustrated in Fig. 4;
  • Fig. 7 illustrates a further practical embodirnen ofthe antenna of Fig. 4 arranged in circular form
  • FIGS. 8 and 8A illustrate still further embodi ments of my invention utilizing the principles outlined above;
  • Fig. 9 illustrates a vertical cross-section of the eld pattern radiated or received by the antenna system in accordance with the principles of my invention
  • Fig. 10 is a diagrammatic illustration used to explain the cancellation of waves polarized in planes other than that of the antenna;
  • Fig. 11 illustrates a receiving circuit utilizing an antenna in accordance with my invention designed for the reception of more than the fre-l antennae constructed in accordance with the principles of my invention
  • Fig. 15 illustrates a beacon transmitter system in accordance with my invention and using antennae of the type disclosed above and a coupling system permitting the simultaneous production of angularly related radiation patterns;
  • Fig. 16 illustrates the eld pattern radiation diagram for an antenna beacon such as shown in Fig. 15;
  • Fig. 17 shows another form of beacon in accordance with my invention.
  • Fig. 18 shows the ield pattern from the beacon of Fig. 17.
  • Figs. 19 and 20 show views of an antenna structure particularly suited for beacon use.
  • FIG. 1 I have shown an arrangement utilizing an antenna indicated generally at coupled to a high frequency source or load 4l.
  • FIG. 1 an embodiment of an antenna in accordance with my invention is disclosed.
  • the antenna 40 is shown coupled to a high frequency source or load 4l.
  • the antenna is composed of two conductors comprising sections 42, ⁇ 43, 44, 45, 46 and 42', 43', 44', 45 and 46', respectively.
  • the conductors are open circuited and are made electrically a halflwave long so that at the ends of the system will Occur current nodes.
  • Parts ol each conductor namely, 42, 46, and 42', 46' are arranged close to each other and at the ends ol conductors 42, 42' is coupled a high frequency translator which may constitute a source of energy or a load.
  • Sections 42, 42' and 46, 46' are preferably chosen of such length that the current maximum occurs at the center of the radiating portion of the conductors, namely, at the mid-point of conductors 44, 44', and the radiating sections comprising portions of the conductors 43, 44, 45 and 43', 44', 45', are made short relative to the operating wavelength so that asubstantially uniform current distribution is obtained.
  • These radiating sections are made preferably of a length in the order of 116 to 1/5 of a wavelength, but should in any case not exceed 1/3 of a wavelength, while the total overall length of each conductor is preferably l a wavelength electrically.
  • should beconnected to energize the conductors in phase opposition so that the instantaneous direction of current flow is around the periphery in the same direction in the radiant acting elements, and is opposite in the closely spaced conductors.
  • 4l is a receiver the receiver is coupled at the same point as would be required for an energy source, in order to obtain the same operation. Itis well known that in any antenna system a receiver must be coupled at a point such that if it were replaced by a source the desired characteristics would be obtained. For this reason the connection of the translating device is made in terms of the effect of a source at this point because no other simple generic language is available.
  • Fig. 2 is illustrated an antenna 50 in accordance with a practical structural arrangement of the antenna shown in Fig. 1.
  • leads 56, 56' arebent downwardly and are enclosed in a grounded shield 51, and the feeders 52, 52', are also enclosed in a grounded shield 58.
  • This construction prevents radiation from these portions of the system so that no vertically polarized waves will result therefrom.
  • conductors 56, 56' are considerably shorter in physical length to obtain the devised electrical length, than if no shielding is present.
  • Fig. 3 is shown a modification of the arrangement illustrated in Figs. 1 and 2 utilizing a single leg of the loop, the other leg being constituted by the image conductors in the conductive surface.
  • a high frequency source 6I is coupled over a shielded conductor 62 tor the radiating loop 63, the endof the conductor being constituted by shielded open ended conductor 64.
  • the dimensions of the single conductor of this modified loop are preferably made the same as those illustrated in connection with a single conductor of Fig. 1.
  • the radiation pattern of the antenna of Fig. 3 is substantially similar to that produced by the structure illustrated in Figs. 1 and 2.
  • Fig. 4 is illustrated a further embodiment of my invention utilizing four different radiating conductors instead of two as in the other embodiment.
  • 'Ihis structure is especially adapted for use as a radiating antenna, since with the four conductors a larger radiation resistance and a consequent increase in energy radiation may be obtained. It is clear, however, that this antenna may also be utilized for reception, since it also provides an increased amount of pick-up.
  • a high frequency source 10 coupled over conductors 1I, 'I2 to four radiators 13. 14. 15 and 16.
  • High frequency source 10 is preferably connected to the mid-point of conductors 1I, 12 and the electrical length from the point of connection to the radiating conductors 13, 16 and to the ends thereof as shown at 13', 16' is made electrically equal to an integral half-wave length of the operating frequency.
  • Conductors 13, 14, 15 and 16 are arranged in a square and the end of each radiator is bent inwardly as shown at 13', 14', 15', 16', so that only the central portions of the conductors are utilized for radiation.
  • Radiators 13 and 16 are fed directly from high frequency source over conductors 1
  • the currents flow through they conductors in the direction indicated by the arrows, the current disposition in each of the four radiators is uniform, as indicated by the solid shaded area 13a to 16a.
  • Each radiating section is preferably made short with respect to the operating wave length so that the current distribution is high throughout the length thereof, and since the current distribution is equal in each of the four arms, and is opposite in phase on the opposite sides thereof, the vertical field component will be substantially eliminated in every direction and for every vertical angle with respect to this radiator. Furthermore, since substantially uniform current distribution is provided in the radiator the resulting radiation pattern will be substantially circular.
  • FIGs. 5 and 6 An embodiment of the antenna in accordance with the principles set forth in connection with Fig. 4, is illustrated in Figs. 5 and 6.
  • the radiators consist of four members 80
  • Each of these radiators extends through entrance type insulators 805 into metallic shieldingboxes designated as 806.
  • Tubular metallic shielding members 801 extend downwardly and inwardly to metallic shielding box 808 from the lower end of which extends the shield 809.
  • 0 extend downwardly from diagonal corners of the antenna to the metallic tube 801 into the shielding box 808 where the transposition is made and any necessary impedance matching of the antenna to the feed supply leads 813, is made.
  • the other or reentrant end of the radiators 8H, 812 extend downwardly in the opposite diagonally arranged shielding tube 801 and so are completely shielded. With this arrangement only the parts of the whole radiating structure containing the current loops are exposed to the weather.
  • the insulators 805 at the end of the radiators are near voltage nodes of the system, so that no high voltage strength existed thereacross.
  • the entire supporting frame is arranged beneath the radiating structure and inside the patterns thereof so that no part of the supporting frame is in the eld of the radiators. The radiation resistance of this structure is high in comparison with the resistance of the wires or insulators so that a very high efficiency is obtained.
  • the radiator of the system according to my invention may be of shape other than straight conductors.
  • Fig. '1 is illustrated an arrangement similar to that shown in Figs. 5 and 6, except that the radiators are each curved so as to form substantially a circular pattern when assembled. Similar reference characters are used in Fig. '1 to designate the various elements corresponding to those shown in Figs. 5 and 6.
  • the radiating system may be composed of more than four conductors, for example, it may comprise eight units arranged in the form illustrated in Fig. 8.
  • the high frequency load or source H00 is coupled to a pair of transposed conductors HOI. These conductors are connected to radiators H02, H03, H04 and H05. H08, H09 and H10 are arranged as shown in Fig. 8.
  • the terminating ends are bent inwardly as shown and arranged close thereto.
  • This arrangement of the terminating ends of these radiators provides a coupling between the directly energized antennae elements H02, H03, H04 and H05, so that each of the other sections H01 to HIO, inclusive, are also energized.
  • a radiating antenna for radiating only horizontally or other plane polarized waves into which a high radiation resistance may be obtained and consequently a greater eiiiciency of operaion.
  • condensers may be used as shown at H00', Fig. 8A. In this case it may be more convenient to make the condensers in the form of strain insulators and the radiant acting sections may be bent in their centers for fastening toa. support. p
  • Fig. 9 is illustrated a vertical section vto the radiation pattern produced by antennae in'accordance with my invention.
  • the horizontal axis is designated by HH and the Vertical axis by VV.
  • the field is represented by the tangent curves F, F.
  • the field is actually in the form of a lemniscate similar in pattern to that obtained from the radiation of a single dipole, but differs therefrom in that there are no vertically polarized components.
  • the voltage at any point in the field may be expressed by equation ErEo cos 0 where Eo is the voltage in the horizontal frame and 0 indicates the angle of elevation.
  • R is the radiation resistance
  • A is the area of the loop in given units and A is the working wavelength in the same type of units as area A.
  • R is the radiation resistance
  • A is the area of the loop in given units
  • A is the working wavelength in the same type of units as area A.
  • the radiation resistance i 4 It 820C?) ohms
  • l is the length of ,one of the radiators in the same units as the wavelength A.
  • a preferred range of radiation resistance is between 7 and 20 ohms.
  • FIG. 10 shows a three dimensional view of a quadrant of the radiation eld from a radiator similar to that illustrated in Fig. 4.
  • the arms corresponding to the four radiators of the antenna are designated by letters A, B, C and D, as shown, with arms A and C being opposite each other and arms B and D being arranged opposite these planes being bounded by curves XY, ZY
  • a third plane is passed through the diagonal of the radiator represented by the lines Z and W, and bounded by the curve w.
  • a dot-dash line starting at X and extending through point P represents the meridian of polarization of energy from radiators A and C
  • the broken line extending from Y through point P represents the meridian of polarization from radiators B and D.
  • radiator C will have a large horizontal component and a small vertical component as shown at c, and at the same time the radiator D will produce a horizontal component in the same direction as that from C and a small equal vertical component oppositely phased to that of point C. It is therefore clear that these two vertical components being equal and opposite will cancel, since P is equi-distant from both radiators B and D.
  • the vertical components from radiators A and B will cancel as shown at a, b, and the horizontally polarized components will add together in phase although they are of opposite phase from elements C and D. Since radiators A and B are at different distances from point P than radiators C and D, there will be a horizontally polarized component which can be received. The vertically polarized components, however, are completely cancelled as explained.
  • Fig. 11 is illustrated an installation of a loop according to my invention, for use as a receiver.
  • This loop is designed for receiving two different frequencies and for this reason is somewhat of a. compromise in design.
  • 302 were arranged to form an oval loop approximately 1'7" long and The two frequencies fi, fz for which the circuit was designed, are 93 and 109 megacycles, respectively.
  • the receivers are represented at
  • 306 is provided for Vernier tuning of the circuit.
  • the radiators are coupled over a special loaded line
  • 308 is made equal to onehalf of the wavelength k2, for which receiver
  • the line is rendered tuned to f2 so that any addition at the termination of line
  • 304 is inductively coupled to line
  • 303 tuned to ,ii is coupled over a shielded pair symmetrically to the antenna over
  • 309 are conductively joined together.
  • the line 301 is made by means of a special loading approximately a quarter of a wavelength long electrically although the actual length is much shorter. In the installation the actual length of line
  • 0 is used to connect transmission line section
  • is used to couple section
  • 308 were made of concentric tubular conductors of outer diameter and the concentric transmission sections
  • were made of concentric transmission lines of onequarter inch outer diameter'.
  • the loaded line I 301 has a relatively high value of surge impedance. This extra high value of surge impedance was found desirable in order to reduce the circulating current in the half-wave length line. 'I'he impedance of the loopitself at the upper terminals may be very high,.for example, say the value is R. Then the impedance at the bottom of the special section line
  • FIG. l2 A further modication by way of improvement ofthe antenna shown in Fig. 11 is illustrated in Fig. l2.
  • Fig. l2 A further modication by way of improvement ofthe antenna shown in Fig. 11 is illustrated in Fig. l2.
  • a considerable voltage exists in the loop at the ends of the loop where it is supported by its insulators.
  • the consequent high impedance at the insulators leads to two troubles.
  • the tuning of the loop is relatively sensitive to additions of capacity, for example, snow may produce a effect, and (2) the high impedance of the insulator requires the use of such a loaded line to reduce loss in the two frequency, tuning circuit illustrated.
  • the loops may be constructed in accordance with the showing of Fig. 12.
  • 402 are broken up by means of condensers
  • the voltage distribution about the loop becomes about 1n the form represented at V.
  • the current distribution in these parts of the conductors is approximately as represented at Io in t' e lower half of Fig. 12.
  • 502 may be a metal tube, for example, aluminum tubing.
  • 503 which may be a ceramic tube.
  • 504 provided with enlarged ends
  • 504 may also be of aluminum.
  • 502 are then clamped in position on insulator
  • antennae in accordance with my invention are particularly suitable for use as horizontally polarized guiding beacons or runway localizer beacons, since they will not produce faulty shifting of courses due to variations in polarization at vertical angles.
  • One form of radio beacon arrangement utilizing antennae in accordance with my invention is illustrated in connection with Figs. 14 to 16.
  • 602 are shown, preferably mounted a ,half a wavelength of the operating frequency apart. These antennae are preferably of the type illustrated in Figs. 5 and 6, but may be of any of the other types illustrated in the application.
  • 602 are connnected together over a transmission line
  • 602 are located a half-Wavelength apart and are energized in phase opposition.
  • Fig. is illustrated an arrangement for producing a guiding course by simultaneous energization of two antennae spaced a half wavelength apart.
  • 102 are connected over transmission lines
  • This network is preferably made of open lines and is provided with two sets of arms
  • a transmitter which may be a common high frequency source
  • the energy thus modulated is transmitted from the separatetransmitter output
  • modulated at F1 is applied to one corner of the bridge
  • 2 is applied to the diagonally opposite corner of the network
  • there results a pattern such as shown at F2 of Fig. 16.
  • 104 are preferably in length equal so that at point b looking in from a, the eiect is the same as though a short circuit existed at this point.
  • 101 may not present an impedance match with respect to energy entering from point a, and reections from b, will result. Similarly energy from point b will be reflected at a.
  • the lengths may be 'so chosen that the reected energy will just compensate for the mismatch and the circuit will operate so as to prevent reflections on the u feeding lines. I have discovered that in order to provide for this effect the individual arms of the bridge network should be substantially .l5 of a wavelength long at the operating frequecy.
  • the radiation patterns are not circular but are deformed so that pattern F1 is somewhat attened and F2 is elongated.
  • the courses are consequently at an angle less than 90 as in the case of circular radiation patterns.
  • the courses actually extend at about 60" with respect to one another.
  • the beacon signals will be derived solely from horizontally polarized waves. Thus any receiver coupled to this system will operate to give the proper course, regardless of any variation in the polarization of the receiving antennae.
  • Fig. 17 is illustrated another form of beacon particularly useful for the utilizing antennae in accordance with the principles outlined above.
  • 0 is coupled to two modulators
  • the arms of the bridge network are preferably made .15 of a wavelength long as explained in connection with Fig. 15.
  • 124 are provided.
  • 124 are connected together by a transmission line in which is provided the phase reversal means, such as the transposition
  • 125 is connected to one corner oi bridge
  • 123 are connected together by a transmission line
  • 129 is made 90 shorter electrically than
  • 1 2 modulated at f2 energizes antennae
  • 124 are displaced a distance a from the center line of the array and antennae
  • the radiation pattern from these arrays will then be formed somewhat as shown in Fig. 18.
  • the broken line curve F'1 represents the transmission pattern from modulator and the solid line curve F'z represents the energy transmitted from
  • may be provided to furnish a modulation frequency, for example, 170 cycles, and modulator
  • Both patterns F1, Fz have some minor lobes of radiation but these are of such small amplitude as to be neglected with respect to the main guiding part.
  • the spacing between the antennae may be varied to change the shape of the radiation pattern.
  • a preferred form using a spacing in which a equals 170 electrical degrees, and is made equal to electrical degrees produces a very sharp pattern free from bothersome minor lobes of radiation.
  • the structure shown in Figs. 5 and 6 presents some diculties since the shielding arrangements such as 801, are at an angle to the vertical and are also disposed in the radiation eld of the other antenna unit. For this reason these angularly disposed sections will pick-up and reradiate some energy and for this reason interfere with the pure horizontal polarization.
  • the antenna may be constructed in the manner shown in Figs. 19 and 20 so that substantially no vertically polarized radiation will be produced.
  • Fig. 19 a front view of this antenna is shown with the cover of central boxes removed so as to show the construction.
  • 902 are provided.
  • 904 the center conductor of which may be used to feed the antennae.
  • 901 In the sides of boxes
  • beacon arrangements disclosed herein are well suited for producing radiation beacon patterns. It is further noted that the spacing between the antennae units is such that radiators of a half wavelength could not be used. Therefore, the particular antennae units in accordance with my invention are admirably suited for this purpose. It should be understood, however, that the particular balancing arrangement and the beacon system may be utilized also, with other forms of antennae, than those producing horizontal polarization.
  • a radio antenna system comprising a peripherally arranged planar radiant acting linear conductor means of small dimensions relative to the operating wavelength arranged along a planar periphery, a transmission line section directly connected to and forming a continuation of said radiant acting conductor means said section being dimensioned to tune said system to the operating frequency to produce substantially uniform current distribution in said radiant acting conductor means, energy transfer means coupled to said transmission line section in energy transfer relation at a point such that if energy were supplied thereat current would circulate about said periphery in the same sense at all points, whereby radiant action of said system is substantially uniform in all directions about said periphery and has everywhere a polarization substantially parallel to said plane.
  • a radio antenna system according to claim 1 wherein said radiant acting conductor means is not over one-third of a wavelength long at the operating frequency.
  • a radio antenna system according to claim '1, wherein said radiant acting conductor means comprises a plurality of separate radiant energy conductors, and said transmission line section comprises at least one part consisting of two con-l ductors connected to at least two of said radiant energy elements, said conductors being adjacent each other and energized in phase opposition, whereby radiation therefrom is substantially neutralized.
  • said radiant acting conductor means comprises two radiant acting elements
  • said transmission line section comprises at least one part consisting of two parallel, closely spaced conductors connected to respective ones of said radiant acting elements and energized in phase opposition, whereby radiant action thereof is substantially neutralized.
  • a radio antenna system according to claim 1, wherein said radiant acting conductor means 'comprises two radiant acting conductors arranged to substantially enclose said periphery,'
  • said transmission line section comprises a pair of parallel conductors connected each to one end of a respective one of said radiant acting conductors, further comprising another pair, of parallel conductors connected to the other end of said radiant acting conductors at one end and open circuited at the other end, the total overall electrical length of one transmission section conductor, one radiant acting conductor and one of said other conductors being substantially onehalf of said operating wavelength.
  • said radiant acting conductor means comprises four substantially equal radiant acting conductors arranged with ends adjacent to define said closed periphery, and said transmission line se ⁇ tion comprising a first pair of conductors connected to the adjacent ends of two of said radiant acting conductors, and a second pair of conductors transposed with respect to one another and connected to the adjacent ends of the other two radiant acting conductors,said Wave energy transfer means being connected to said first and second conductor pairs at a point equidistant from said radiant acting conductors, further comprising other open ended conductors connected to each of the other ends of said radiant acting conductors, said other conductors connected to adjacent ones of said other ends extending parallel to one another to neutralize radiant action thereof, said radiant acting conductors, said transmission line section conductors and said other conductors being so dimensioned that the current distribution in each of said radiant energy conductors is substantially uniform.
  • a radio transmitting arrangement including a radio antenna system comprising radiating means of small dimensions relative to the operating' wavelength arranged in a single plane, a transmission line section forming a continuation of said radiating means dimensioned to tune said radiating means electrically to said operating wavelength, the conductors of said section being arranged close to each other and wave transmitting means coupled to said transmission line section, in such a manner as to cause instantaneous current flow in all parts of said radiant energy means in the same sense, whereby the radiant action of said system is substantially uniform in ⁇ all directions and has everywhere a polarization parallel to said plane.
  • a radio translating system including a radio antenna comprising a plurality of radiant acting conductors arranged with ends adjacent to form a closed coplanar periphery, each of said radiant acting conductors being short with respect tothe operating wavelength, conductor means connected to the ends of each of said radiant acting elements, said conductor means at each of the adjacent ends of said radiant acting elements being arranged close to each other,
  • said conductor means from two oppositeiy positioned adjacent ends being connected to an energy transfer means.
  • energy ⁇ translating means coupled to 5 said energy transfer means, whereby current distribution throughout said radiant acting conductors is substantially uniform and the direction o1 energization thereof is all in the same sense.
  • each of sai radiant acting conductors is from one-tenth to one-fifth of a Wavelength long at the operating frequency.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
US270173A 1939-04-26 1939-04-26 Antenna system Expired - Lifetime US2283897A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
NL64189D NL64189C (fr) 1939-04-26
US270173A US2283897A (en) 1939-04-26 1939-04-26 Antenna system
GB4095/40A GB538036A (en) 1939-04-26 1940-03-05 Antenna systems
FR864920D FR864920A (fr) 1939-04-26 1940-04-15 Systèmes d'aériens radioélectriques
US403519A US2306113A (en) 1939-04-26 1941-07-22 Antenna system
CH292838D CH292838A (fr) 1939-04-26 1947-05-01 Dispositif d'antenne radioélectrique.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US270173A US2283897A (en) 1939-04-26 1939-04-26 Antenna system

Publications (1)

Publication Number Publication Date
US2283897A true US2283897A (en) 1942-05-26

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Application Number Title Priority Date Filing Date
US270173A Expired - Lifetime US2283897A (en) 1939-04-26 1939-04-26 Antenna system

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US (1) US2283897A (fr)
CH (1) CH292838A (fr)
FR (1) FR864920A (fr)
GB (1) GB538036A (fr)
NL (1) NL64189C (fr)

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2424079A (en) * 1943-04-19 1947-07-15 Gen Electric System of communication
US2429634A (en) * 1943-06-12 1947-10-28 Standard Telephones Cables Ltd Four course beacon
US2465379A (en) * 1945-01-27 1949-03-29 Standard Telephones Cables Ltd Antenna unit
US2485773A (en) * 1943-06-01 1949-10-25 Hartford Nat Bank & Trust Co Device for the alternating voltage supply of a load
US2511899A (en) * 1944-12-30 1950-06-20 Rca Corp Antenna system
US2513338A (en) * 1943-11-01 1950-07-04 Sperry Corp Directive antenna system
US2534624A (en) * 1943-05-29 1950-12-19 Hartford Nat Bank & Trust Co Transmitting device
US2557994A (en) * 1945-10-12 1951-06-26 Standard Telephones Cables Ltd Object detector
US2602887A (en) * 1948-10-04 1952-07-08 Rca Corp Radio transmitter
US2618746A (en) * 1948-08-13 1952-11-18 Rca Corp Antenna system
US2648001A (en) * 1946-04-11 1953-08-04 Us Navy Ring type antenna
US2650304A (en) * 1949-09-10 1953-08-25 Motorola Inc Television antenna
US2650303A (en) * 1949-07-01 1953-08-25 Motorola Inc High-frequency loop antenna system
US2671852A (en) * 1951-12-05 1954-03-09 John J Bubbers Resonant antenna
US2749544A (en) * 1953-05-29 1956-06-05 Gen Dynamics Corp Omnidirectional antenna
US2817835A (en) * 1945-11-29 1957-12-24 Jr Harvey R Worthington Lobe comparison systems
US2825061A (en) * 1951-11-21 1958-02-25 Gabriel Co Wave radiator
US3168694A (en) * 1961-07-24 1965-02-02 Donald W Slattery Geophysical survey systems using polarized electromagnetic waves
US3427624A (en) * 1966-07-13 1969-02-11 Northrop Corp Low profile antenna having horizontal tunable top loading member
US3967282A (en) * 1974-01-30 1976-06-29 The Ohio State University Underground pipe detector
US6515632B1 (en) 2001-06-06 2003-02-04 Tdk Rf Solutions Multiply-fed loop antenna
EP2034557A3 (fr) * 2007-09-06 2009-10-28 Delphi Delco Electronics Europe GmbH Antenne pour la réception de satellites
US7639195B2 (en) * 2004-11-22 2009-12-29 Agency For Science, Technology And Research Antennas for ultra-wideband applications
US7825866B1 (en) 2007-09-28 2010-11-02 Joseph Klein Omni directional space-fed antenna with loop patterns
US7936309B2 (en) 2007-09-06 2011-05-03 Delphi Delco Electronics Europe Gmbh Antenna for satellite reception
WO2014170787A1 (fr) 2013-04-17 2014-10-23 Telefonaktiebolaget L M Ericsson (Publ) Appareil et procédé d'antenne omnidirectionnelle polarisée horizontalement
US12212069B2 (en) 2020-05-09 2025-01-28 Huawei Technologies Co., Ltd. Antenna for a wireless communication device and such a device

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2036909B1 (fr) * 1969-04-17 1974-02-22 Thomson Csf
US4338606A (en) * 1978-12-21 1982-07-06 Sony Corporation Antenna system with variable directivity

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2424079A (en) * 1943-04-19 1947-07-15 Gen Electric System of communication
US2534624A (en) * 1943-05-29 1950-12-19 Hartford Nat Bank & Trust Co Transmitting device
US2485773A (en) * 1943-06-01 1949-10-25 Hartford Nat Bank & Trust Co Device for the alternating voltage supply of a load
US2429634A (en) * 1943-06-12 1947-10-28 Standard Telephones Cables Ltd Four course beacon
US2513338A (en) * 1943-11-01 1950-07-04 Sperry Corp Directive antenna system
US2511899A (en) * 1944-12-30 1950-06-20 Rca Corp Antenna system
US2465379A (en) * 1945-01-27 1949-03-29 Standard Telephones Cables Ltd Antenna unit
US2557994A (en) * 1945-10-12 1951-06-26 Standard Telephones Cables Ltd Object detector
US2817835A (en) * 1945-11-29 1957-12-24 Jr Harvey R Worthington Lobe comparison systems
US2648001A (en) * 1946-04-11 1953-08-04 Us Navy Ring type antenna
US2618746A (en) * 1948-08-13 1952-11-18 Rca Corp Antenna system
US2602887A (en) * 1948-10-04 1952-07-08 Rca Corp Radio transmitter
US2650303A (en) * 1949-07-01 1953-08-25 Motorola Inc High-frequency loop antenna system
US2650304A (en) * 1949-09-10 1953-08-25 Motorola Inc Television antenna
US2825061A (en) * 1951-11-21 1958-02-25 Gabriel Co Wave radiator
US2671852A (en) * 1951-12-05 1954-03-09 John J Bubbers Resonant antenna
US2749544A (en) * 1953-05-29 1956-06-05 Gen Dynamics Corp Omnidirectional antenna
US3168694A (en) * 1961-07-24 1965-02-02 Donald W Slattery Geophysical survey systems using polarized electromagnetic waves
US3427624A (en) * 1966-07-13 1969-02-11 Northrop Corp Low profile antenna having horizontal tunable top loading member
US3967282A (en) * 1974-01-30 1976-06-29 The Ohio State University Underground pipe detector
US6515632B1 (en) 2001-06-06 2003-02-04 Tdk Rf Solutions Multiply-fed loop antenna
US7639195B2 (en) * 2004-11-22 2009-12-29 Agency For Science, Technology And Research Antennas for ultra-wideband applications
CN101103490B (zh) * 2004-11-22 2011-03-30 新加坡科技研究局 应用于超宽频之天线
EP2034557A3 (fr) * 2007-09-06 2009-10-28 Delphi Delco Electronics Europe GmbH Antenne pour la réception de satellites
US7936309B2 (en) 2007-09-06 2011-05-03 Delphi Delco Electronics Europe Gmbh Antenna for satellite reception
US7825866B1 (en) 2007-09-28 2010-11-02 Joseph Klein Omni directional space-fed antenna with loop patterns
WO2014170787A1 (fr) 2013-04-17 2014-10-23 Telefonaktiebolaget L M Ericsson (Publ) Appareil et procédé d'antenne omnidirectionnelle polarisée horizontalement
US12212069B2 (en) 2020-05-09 2025-01-28 Huawei Technologies Co., Ltd. Antenna for a wireless communication device and such a device

Also Published As

Publication number Publication date
CH292838A (fr) 1953-08-31
FR864920A (fr) 1941-05-08
NL64189C (fr)
GB538036A (en) 1941-07-17

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