CN203503783U

CN203503783U - Ultra Wideband Antenna with Dual Notch Characteristics

Info

Publication number: CN203503783U
Application number: CN201320394613.9U
Authority: CN
Inventors: 周喜权; 惠鹏飞; 赵岩
Original assignee: Qiqihar University
Current assignee: Qiqihar University
Priority date: 2013-06-28
Filing date: 2013-06-28
Publication date: 2014-03-26
Anticipated expiration: 2023-06-28

Abstract

The utility model relates to an ultra wideband antenna possessing double trapped wave characteristics, comprising a medium plate, a radiation unit, a ground plate and a microstrip feed line. The ground plate, radiation unit, and microstrip feed line are printed on the upper and lower sides of the medium plate; the surface of the radiation unit is etched with a U-shaped slit, a C-shaped slit, and three pairs of slits with symmetrical bottom edges; the superior angle of the ground plate on the lower side of the medium plate is symmetrically etched with two rectangular notches; the U-shaped slit and the C-shaped slit form two trapped wave frequency ranges to respectively correspond with 3.3 GHz-3.6 GHz and 5.15 GHz-5.825GHz; the two symmetrical rectangular notches on the upper parts of the ground plate and three pairs of slits with unequal lengths on the bottom of the radiation unit are used for regulating the band width of a whole wide frequency antenna. The ultra-wideband antenna has a work bandwidth frequency range covering 3.01-11.65GHz, can well restrain interference signals in an ultra wideband work frequency range and is used for ultra wideband wireless communication.

Description

The ultra-wideband antenna with two trap characteristics

Technical field

The invention belongs to antenna technical field, particularly a kind of ultra-wideband antenna with two trap characteristics, is applied to ultra-wideband antenna communication system.

Background technology

Ultra broadband UWB technology is a kind of novel wireless communication technology, has the features such as transmission rate is high, low in energy consumption, system configuration is simple, thereby becomes one of study hotspot of radio communication in recent years.As the critical component of ultra-wideband communication system, the characteristic of ultra-wideband antenna directly affects the transmission characteristic performance of system, significant to its research and design.The working frequency range of the FCC of FCC approval in 2002 using 3.1～10.6GHz as radio ultra wide band system, yet in this frequency range, may there is the narrow-band interference signal of some wireless communication systems, such as frequency range is positioned at the worldwide interoperability for microwave access WiMax of 3.3GHz～3.6GHz and WLAN (wireless local area network) WLAN that frequency range is positioned at 5.15GHz～5.825GHz etc.Therefore, ultra-wideband antenna must produce trap in these frequency ranges, with the interference problem of avoiding existing.

The simplest effective ways are in antenna, to introduce trap structure, make antenna in interference band, produce larger reflection, suppress the transmission of interference signal.Trap structure can be in radiating element or the difform gap of floor unit etching, or in antenna structure, introduces parasitic minor matters etc.In numerous designs, be all to utilize various shape antennas and gap structure to complete various trap antennas.

Summary of the invention

The object of the invention is for existing technology, a kind of bandwidth is proposed, gain is large, the ultra-wideband antenna with two trap characteristics of miniaturization, in 3.1GHz～10.6GHz frequency range, make standing-wave ratio all be less than 2, covering ultra wideband working frequency range, and can leach the interference signal of WiMAX and WLAN frequency range, realize high-quality ultra-wideband communications.

Above-mentioned target realizes by the following method:

A kind of ultra-wideband antenna with two trap characteristics, comprise: dielectric-slab (1), radiating element (2), ground plate (3) and 50 Ω microstrip feed lines (4), radiating element (2) is connected with microstrip feed line (4) top, be distributed in axisymmetricly dielectric-slab (1) front, and ground plate (3) is relative with microstrip feed line (4) at dielectric-slab (1) back side, it is characterized in that:

On described radiating element (2), be etched with U-shaped (5) and C type (6) resonant slot, axial symmetry is in dielectric-slab (1) front, U-shaped (5) Open Side Down, C type (6) opening can be up or down, and the frequency range of formation covers 3.3GHz～3.6GHz and two traps of 5.15GHz～5.825GHz;

Described radiating element (2) bottom bilateral symmetry has three pairs of not isometric gaps (7), and the diagonal angle, both sides, top of ground plate (3) cuts respectively two rectangles.

The described ultra-wideband antenna with two trap characteristics, radiating element (2) is combination oval or circle and rectangle.

The described ultra-wideband antenna with two trap characteristics, on radiating element (2), be carved with the gap of U-shaped (5) and (6) two shapes of C type, U-shaped (5) A/F value is 14.5mm, and C type (6) A/F value is 1mm～2mm.

Described two trap characteristic ultra-wideband antennas, U-shaped (5) seam length value is 34.6mm～36.6mm, C type (6) radius value is 4.0mm～4.5mm, stitches wide value and is 0.3mm～0.5mm.

Described two trap characteristic ultra-wideband antennas, radiating element (2) bottom bilateral symmetry has three pairs of not isometric gaps (7), its length value is 1.3mm～2.6mm, and gap spacing value is 0.3mm～0.5mm, stitches wide value and is 0.4mm～0.5mm.

Described two trap characteristic ultra-wideband antennas, the both sides value that ground plate (3) top two symmetric angle are cut rectangle is 1.0mm～2.0mm.

Described two trap characteristic ultra-wideband antennas, the dielectric constant of dielectric-slab (3) is between 2～9.8, and dielectric-slab (3) thickness (8) is 0.5mm～2.0mm, and dielectric loss is less than 10 ^-3.

The present invention has advantages of:

The present invention, in the method in the upper etching U-shaped gap respectively of radiating element (2) and C shape gap, is convenient to adjust respectively two trap resonance frequencys, reduces both influencing each other.

The present invention is due in two kinds of gaps of the upper etching of radiating element (2), the impact that effectively arrowband brings during the work of filtering ultra-wideband antenna, and filtration result is better.

The present invention adopts the way of slotting in radiation patch, has replaced design of filter, has reduced technical costs and system complexity, makes antenna structure simple, small and exquisite, easy to process, is convenient to produce.

The present invention can adjust voluntarily as required and improve, and changes gap length and the position of etching, and various interfering frequencies in the required band leaching of capable of regulating, meet various application needs.

Accompanying drawing explanation

The front view that Fig. 1 designs for the present invention;

The bottom view that Fig. 2 designs for the present invention

The end view that Fig. 3 designs for the present invention;

The emulation standing wave curve chart that Fig. 4 designs for the present invention;

The emulation antenna pattern at 7GHz that Fig. 5 designs for the present invention;

The emulation antenna pattern at 10GHz that Fig. 6 designs for the present invention;

Fig. 7 is gain diagram of the present invention.

Embodiment:

Described two trap characteristic ultra-wideband antennas, the dielectric constant of dielectric-slab (1) is between 2～9.8, and dielectric-slab (1) thickness (8) is 0.5mm～2.0mm, and dielectric loss is less than 10 ^-3.

Effect of the present invention can describe by following analogous diagram:

The present invention obtains ultra-wideband antenna working frequency range by HFSS software and covers 3.1GHz～10.6GHz, forms two traps, and trap frequency range covers respectively 3.3～3.6GHz and 5.15～5.825GHz, and its result is as Fig. 4.

The present invention is at the antenna pattern of 7GHz and 10GHz as Fig. 5 and Fig. 6, and E face field has class dipole radiation Direction Distribution Characteristics, and H face field has omnidirectional's Direction Distribution Characteristics.

Gain profiles result of the present invention is as Fig. 7, and in its working frequency range, substantially at-5dB～6dB, two trap revenue centre frequency places gains significantly decline, and antenna is worked hardly in trap frequency range, reaches and suppresses the effect disturbed.

Claims

1. An ultra-broadband antenna with double notch characteristics, comprising: dielectric plate (1), radiation element (2), ground plate (3) and 50Ω microstrip feeder (4), radiation element (2) and microstrip The upper part of the belt feeder (4) is connected, and is distributed axially symmetrically on the front of the dielectric board (1), while the grounding board (3) is opposite to the microstrip feeder (4) on the back of the dielectric board (1), and is characterized in that:

The radiation unit (2) is etched with U-shaped (5) and C-shaped (6) resonant slots, which are axisymmetric to the front of the dielectric plate (1), the U-shaped (5) opening is downward, and the C-shaped (6) opening is Can be up or down, the formed frequency band covers two notches of 3.3GHz~3.6GHz and 5.15GHz~5.825GHz;

The two sides of the lower part of the radiation unit (2) are symmetrically provided with three pairs of slits (7) of unequal length, and two rectangles are cut off diagonally on both sides of the upper part of the grounding plate (3).

2. The ultra-wideband antenna with dual notch characteristics according to claim 1, characterized in that the radiation unit (2) is an ellipse or a combination of a circle and a rectangle. the

3. The ultra-broadband antenna with double notch characteristics according to claim 1, characterized in that the radiating element (2) is engraved with two shapes of U-shaped (5) and C-shaped (6) slits, U-shaped (5) The value of the opening width is 14.5mm, and the value of the C type (6) The opening width is 1mm to 2mm. the

4. The ultra-wideband antenna with dual notch characteristics according to claim 1, characterized in that the length of the U-shaped (5) slit is 34.6 mm to 36.6 mm, and the radius of the C-shaped (6) is 4.0 mm to 4.5 mm. mm, and the value of the seam width is 0.3mm to 0.5mm. the

5. The dual-notch characteristic ultra-wideband antenna according to claim 1, characterized in that there are three pairs of slits (7) of unequal length symmetrically arranged on both sides of the bottom of the radiation unit (2), and the length thereof is 1.3 mm to 1.3 mm. 2.6mm, the value of the gap spacing is 0.3mm to 0.5mm, and the value of the gap width is 0.4mm to 0.5mm. the

6. The ultra-wideband antenna with dual notch characteristics according to claim 1, characterized in that the upper two symmetrical corners of the grounding plate (3) are cut off and the values of the two sides of the rectangle are 1.0 mm to 2.0 mm. the

7. The ultra-wideband antenna with dual notch characteristics according to claim 1, characterized in that the dielectric constant of the dielectric plate (3) is between 2 and 9.8, and the thickness (8) of the dielectric plate (3) is 0.5mm ～2.0mm, the dielectric loss is less than 10 ^-3 .