CN105226391A - There is the ultra wide band resistance antenna of rectangle stopband characteristic - Google Patents

Abstract

The invention discloses an ultra-wideband band-stop antenna with a rectangular stop-band characteristic, and by placing an electromagnetic bandgap structure on a feeder line of a coplanar waveguide or a microstrip waveguide of the ultra-wideband antenna, electromagnetic energy in a certain frequency range cannot pass through, resulting in a stop band. The EBG structure is a strong resonance structure with a steep resonance curve, so the combination of two EBG structures can produce a rectangular stop band. By adjusting the size of the two EBG structures, the stop band frequency and the stop band width can be adjusted conveniently, which improves the optimization efficiency and saves system resources and related efficiency. In addition, the EBG structure is placed on the feeder, which has little impact on the radiation patch. Therefore, the antenna designed in the present invention is suitable for ultra-wideband systems with narrowband crosstalk.

Description

Ultra-Wide Band Stop Antenna with Rectangular Stop Band Characteristic

technical field

The invention relates to the field of ultra-wideband antennas, in particular to an ultra-wideband band-stop antenna with a rectangular band-stop characteristic.

Background technique

The demand for short-distance high-data-rate wireless communication drives the development of ultra-wideband (Ultra-Wideband, UWB) technology. However, narrowband systems often exist in the working environment of ultra-wideband systems, such as wireless local area network (Wireless Local-AreaNetwork, WLAN, 5.150-5.825GHz) and X-band downlink satellite communication (X-banddownlinksatellitecommunication, 7.10-7.76GHz) are located in the United States Federal Communications Within the 3.1-10.6GHz ultra-wideband communication frequency band specified by the committee. The mutual crosstalk between the narrowband system and the UWB system seriously affects the quality of communication. An efficient and economical solution to crosstalk is to implement a stopband on the UWB antenna to suppress the crosstalk at the front end of the system.

At present, there have been many researches on UWB band-stop antennas at home and abroad, and their methods of producing stop bands are generally by carving grooves on the radiation patch or the floor or using parasitic resonant units, such as the Chinese invention patent application publication number CN104485504A "A Bluetooth ultra-wideband antenna with dual notch characteristics", the Chinese invention patent application publication No. CN103956572A "Ultra-wideband antenna with three-band rejection notch and additional Beidou band-pass frequency band characteristics" and the announcement No. The Chinese invention patent application of CN104638355A discloses "an ultra-wideband antenna with double notch characteristics". Although these studies have produced a stop band on the ultra-wideband frequency band of the antenna, they all have a common shortcoming, that is, Their stop band curves are relatively sharp. The interference narrowband has a certain frequency band (such as WLAN from 5.150-5.825GHz, X-band downlink satellite communication frequency band from 7.10-7.76GHz), which greatly reduces the edge frequency suppression of the interference narrowband.

Contents of the invention

What the present invention aims to solve is the problem that the stop band of the existing antenna is relatively sharp, and provides an ultra-wide band stop band antenna with a rectangular stop band characteristic.

In order to solve the above problems, the present invention is achieved through the following technical solutions:

An ultra-wideband band-stop antenna with a rectangular stop-band characteristic, comprising an ultra-wide-band antenna body, the ultra-wide-band antenna body comprising a dielectric substrate, and two metal floors, a signal line and a radiator attached to the upper surface of the dielectric substrate; The radiator and the signal line are located in the middle of the dielectric substrate 1, and the radiator is connected to one end of the signal line; the two metal floors are located on the left and right sides of the signal line; the coplanar waveguide composed of the metal floor and the signal line; the difference The advantage is: further comprising at least two electromagnetic bandgap structures arranged at intervals;

Each electromagnetic bandgap structure is composed of a metal patch and a short-circuit pin; the metal patch is attached to the lower surface of the dielectric substrate; one end of the short-circuit pin is connected to the metal patch, and the other end passes through the dielectric substrate and the UWB antenna body connected to the signal line or radiator.

In the above solution, the sizes of the metal patches of all electromagnetic bandgap structures are different, so that the resonant frequency of each electromagnetic bandgap structure is different, so as to form a rectangular stopband characteristic.

In the above solution, the short-circuit pin is connected to the edge of the side of the metal patch close to the signal line, so as to improve the radiation performance.

In the above solution, the short-circuit pin vertically passes through the dielectric substrate.

In the above scheme, the other ends of all the short-circuit pins of the electromagnetic bandgap structure are connected to the signal line; or the other ends of all the short-circuit pins of the electromagnetic bandgap structure are connected to the radiator; One end is connected with the signal line, and the other end of the short-circuit pin of the other electromagnetic bandgap structure is connected with the radiator.

Another ultra-wideband bandstop antenna with rectangular stopband characteristics includes an ultra-wideband antenna body, which is composed of a dielectric substrate, a metal floor, a signal line and a radiator; wherein the radiator and the signal line are attached to the dielectric The upper surface of the substrate, and the radiator is connected to one end of the signal line; the metal floor is covered on the lower surface of the dielectric substrate; the microstrip waveguide composed of the metal floor and the signal line; the difference is that it further includes at least 2 intervals The electromagnetic bandgap structure is set; each electromagnetic bandgap structure is composed of a metal patch and a short-circuit pin; the metal patch is attached to the upper surface of the dielectric substrate; one end of the short-circuit pin is connected to the metal patch, and the other end passes through the The dielectric substrate is connected with the metal floor of the UWB antenna body.

In the above solution, the sizes of the metal patches of all electromagnetic bandgap structures are different, so that the resonant frequency of each electromagnetic bandgap structure is different, so as to form a rectangular stopband characteristic.

In the above solution, the short-circuit pin is connected to the edge of the side of the metal patch close to the signal line, so as to improve the radiation performance.

In the above solution, the short-circuit pin vertically passes through the dielectric substrate.

In the above solution, all electromagnetic bandgap structures are located on the same side of the signal line.

Compared with the prior art, the present invention places an electromagnetic bandgap (EBG) structure on the coplanar waveguide (CPW) feeder of the ultra-wideband antenna, so that electromagnetic energy in a certain frequency range cannot pass through, thereby generating a stop band . The EBG structure is a strong resonance structure with a steep resonance curve, so the combination of two EBG structures can produce a rectangular stop band. By adjusting the size of the two EBG structures, the stop band frequency and the stop band width can be adjusted conveniently, which improves the optimization efficiency and saves system resources and related efficiency. In addition, the EBG structure is placed on the feeder, which has little impact on the radiation patch. Therefore, the antenna designed in the present invention is suitable for ultra-wideband systems with narrowband crosstalk.

Description of drawings

Fig. 1 is a front view of a UWB band-stop antenna with rectangular stop-band characteristics;

Fig. 2 is the rear view of a kind of ultra-wideband band stop antenna with rectangular stop band characteristics;

Fig. 3 is the side view of a kind of ultra-wideband band stop antenna with rectangular stop band characteristics;

Fig. 4 is the S11 curve of the example 1 antenna of the antenna shown in Fig. 1-3;

Fig. 5 is the radiation pattern of the example 1 antenna of the antenna shown in Fig. 1-3 at 3.5 GHz;

Fig. 6 is the radiation pattern of the example 1 antenna at 7.0 GHz of the antenna shown in Fig. 1-3;

Fig. 7 is the radiation pattern of the example 1 antenna of the antenna shown in Fig. 1-3 at 10.0 GHz;

Fig. 8 is the S11 curve of the example 2 antenna of the antenna shown in Fig. 1-3;

Fig. 9 is a radiation pattern at 3.5 GHz of the example 2 antenna of the antenna shown in Fig. 1-3;

Fig. 10 is a radiation pattern at 6.0 GHz of the example 2 antenna of the antenna shown in Fig. 1-3;

Fig. 11 is a radiation pattern at 10.0 GHz of the example 2 antenna shown in Figs. 1-3.

Fig. 12 is the front view of another kind of UWB band stop antenna with rectangular stop band characteristics;

Fig. 13 is the rear view of another kind of ultra-wideband band stop antenna with rectangular stop band characteristics;

Fig. 14 is a side view of another UWB bandstop antenna with rectangular stopband characteristics.

Labels in the figure: 1. Dielectric substrate; 2. Metal floor; 3. Signal line; 4. Radiator; 5. Electromagnetic bandgap structure; 5-1. Metal patch; 5-2 Short-circuit pin

detailed description

The present invention is described in detail below in conjunction with accompanying drawing and specific embodiment, present embodiment is carried out under the premise of technical solution of the invention, has provided detailed embodiment and specific operation process, but protection scope of the present invention is not limited to the following Example. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Embodiment one:

An ultra-wideband band-stop antenna with rectangular stop-band characteristics, as shown in Figure 1-3, is a coplanar waveguide antenna, including an ultra-wideband (UWB) antenna body and at least two electromagnetic bandgap (EBG) structures5 .

The structure of the UWB antenna body is the same as or similar to that of the existing coplanar waveguide antenna, and consists of a dielectric substrate 1 , a metal floor 2 , a signal line 3 and a radiator 4 attached to the upper surface of the dielectric substrate 1 . The radiator 4 and the signal line 3 are located in the middle of the dielectric substrate 1, and the radiator 4 is connected to one end of the signal line 3, and the combination of the two is T-shaped. The two metal floors 2 are located on the left and right sides of the signal line 3 , and the metal floor 2 and the signal line 3 form a coplanar waveguide (CPW). The shape of the radiator 4 can be designed as required, such as circular, oval, square, rectangular, triangular or other shapes. The shape of the signal line 3 is a long straight strip. The two metal floor plates 2 are both rectangular in shape and of the same size. The heights of the two metal floors 2 are both less than or equal to the length of the signal line 3 .

In this embodiment, the radiator 4 adopts an elliptical patch structure, and uses a coplanar waveguide formed by the metal floor 2 and the signal line 3 for feeding. The radiator 4 and the coplanar waveguide are located on the same surface of the dielectric substrate 1 . The width of the signal line 3 is 3.5mm, and the gap between the signal line 3 and the metal floor 2 is 0.2mm, so the characteristic impedance of the coplanar waveguide (CPW) is 50Ω. The radius of the major axis of the radiator 4 is 13 mm, and the radius of the minor axis is 9.5 mm, so that the working frequency covers the range of 3.1-10.6 GHz.

Each electromagnetic bandgap structure 5 is composed of a metal patch 5-1 and a short-circuit pin 5-2. The metal patch 5 - 1 is attached to the lower surface of the dielectric substrate 1 . One end of the short-circuit pin 5-2 is connected to the metal patch 5-1, and the other end passes through the dielectric substrate 1 and is connected to the signal line 3 or the radiator 4 of the ultra-wideband antenna body. At this time, the signal line 3 or the radiator 4 acts as a Electromagnetic bandgap structure 5 for floor use. The number of electromagnetic bandgap structures 5 is determined according to the requirement of the stopband width, and the wider the stopband width is, the more the number of electromagnetic bandgap structures 5 is. During specific layout, every two electromagnetic bandgap structures 5 need to be separated from each other by a certain distance. In order to allow the antenna to have stopband characteristics, the electromagnetic bandgap structure 5 should be located on or near the feeder line of the antenna. Specifically, the distribution of the electromagnetic bandgap structure 5 can be in the following ways: short circuit of all the electromagnetic bandgap structures 5 The other end of the pin 5-2 is connected to the signal line 3; the other end of the short-circuit pin 5-2 of all the electromagnetic bandgap structures 5 is connected to the radiator 4; the other end of the short-circuit pin 5-2 of a part of the electromagnetic bandgap structure 5 One end is connected to the signal line 3 , and the other end of the short-circuit pin 5 - 2 of the other electromagnetic bandgap structure 5 is connected to the radiator 4 . The shape of the metal patch 5-1 is set according to needs, and can be circular, oval, square, rectangular, triangular or other shapes, and the size is designed according to design requirements. When the short-circuit pin 5-2 is connected to the metal patch 5-1, it can be connected in the middle of the metal patch 5-1 or anywhere on the metal patch 5-1, but in order to improve the radiation performance, the short-circuit pin 5-2 Try to connect to the edge of the side of the metal patch 5-1 close to the signal line 3. The short-circuit pin 5 - 2 can penetrate the dielectric substrate 1 obliquely or vertically. The sizes of the metal patches 5 - 1 of all the electromagnetic bandgap structures 5 are different. By adjusting the size parameters of the electromagnetic bandgap structures 5 , a stopband of any frequency band can be realized. The resonant frequencies of the electromagnetic bandgap structures 5 are similar, forming a rectangular stop band.

In this embodiment, the metal patch 5 - 1 adopts a rectangular structure and is located directly below the signal line 3 . The shorting pin 5 - 2 is perpendicular to the plane where the metal patch 5 - 1 and the signal line 3 are located, and is embedded in the dielectric substrate 1 . One end of the short-circuit pin 5-2 is connected to the metal patch 5-1, and the other end is connected to the signal line 3. At this time, the signal line 3 is used as the floor of the electromagnetic bandgap structure 5. The position of the short-circuit pin 5-2 can be located at any position in the metal patch 5-1. In this embodiment, in order to obtain better performance and smaller size, the short-circuit pin 5-2 is arranged on the metal patch 5-1. at the edge. In order to obtain a rectangular stop band, this embodiment includes two electromagnetic bandgap structures 5 , namely two metal patches 5 - 1 and two shorting pins 5 - 2 . Both the first metal patch 5-1 and the second metal patch 5-1 are located directly below the signal line 3, one end of the first short-circuit pin 5-2 is connected to the first metal patch 5-1, and the other end is connected to the signal line 3. One end of the second short-circuit pin 5-2 is connected to the second metal patch 5-1, and the other end is connected to the signal line 3. The resonant frequencies of the two electromagnetic bandgap structures 5 are close to each other to form a rectangular characteristic stop band. By adjusting the size of the two metal patches 5-1, the frequency of the rectangular characteristic stop band can be adjusted, and the width of the rectangular characteristic stop band can also be adjusted, so that the optimized performance of the ultra-wideband band stop antenna meets the requirements for suppressing different narrow bands crosstalk band requirements.

In order to make the resonant frequency of the electromagnetic bandgap structure 5 be located in the WLAN frequency band, the parameters of the two rectangular metal patches 5-1 of the electromagnetic bandgap structure 5 are respectively: a1*b1=3.5mm*7.9mm and a2*b2= 3.5mm×7.7mm, where a1 and b1 are the side lengths of the first metal patch 5-1, and a2 and b2 are the side lengths of the second metal patch 5-1.

FIG. 4 is the S11 curve of the example 1 antenna. Generally, if the S11 of the antenna in a certain frequency band is less than -10dB, the frequency band is considered to be a passband for normal operation; if the S11 of a certain frequency band is greater than -10dB, the frequency band is considered to be a stopband. The S11 of the antenna in Example 1 in the 5.02-5.98GHz frequency range is greater than -10dB and the maximum value reaches -0.18dB, which is an obvious stop band, covering the entire WLAN frequency band; while the S11 of other UWB frequency bands outside the stop band is less than -10dB, Good match. It can also be seen from the S11 curve that the shape of the stopband is similar to a rectangle, so that the stopband has a good suppression effect on the entire WLAN frequency band.

Fig. 5, Fig. 6 and Fig. 7 are the radiation patterns of the antenna of Example 1 at 3.5GHz, 7.0GHz and 10.0GHz respectively. It can be seen that the E plane of the antenna is almost an "8"-shaped radiation pattern, and the H plane is almost omnidirectional radiation, which is suitable for ultra-wideband communication.

In order to make the resonant frequency of the electromagnetic bandgap structure 5 be located in the X-band downlink satellite communication frequency band, the parameters of the two rectangular metal patches 5-1 of the electromagnetic bandgap structure 5 are: a1*b1=2.8mm*5.6mm and a2 ×b2=2.8mm×5.8mm, where a1 and b1 are the side lengths of the first metal patch 5-1, and a2 and b2 are the side lengths of the second metal patch 5-1.

Fig. 8 is the S11 curve of the example 2 antenna. It can be seen that the S11 of the antenna in Example 2 in the 7.03-7.88GHz frequency range is greater than -10dB and the maximum value reaches -1.19dB, which is an obvious stop band, covering the entire X-band downlink satellite communication frequency band; while other UWB frequency bands outside the stop band The S11 is less than -10dB, good match. It can be seen from the S11 curve that, similar to the example 1 antenna, the stopband shape of the example 2 antenna is also similar to a rectangle, so that the stopband has a good suppression effect on the entire X-band downlink satellite communication frequency band.

Fig. 9, Fig. 10 and Fig. 11 are the radiation patterns of the antenna of Example 2 at 3.5GHz, 6.0GHz and 10.0GHz respectively. It can be seen that the E plane of the antenna is almost an "8"-shaped radiation pattern, and the H plane is almost omnidirectional radiation, which is suitable for ultra-wideband communication.

It can be seen that the present invention places several electromagnetic bandgap (EBG) structures with different resonance frequencies on the feeder (i.e. signal line) of the coplanar waveguide of the ultra-wideband antenna, so that the stop bands of different electromagnetic bandgap (EBG) structures are close to each other fused to form a stopband with rectangular properties. It can effectively suppress the interference of narrowband systems such as WLAN (5.150-5.825GHz) and X-band downlink satellite communication (7.10-7.76GHz).

In summary, the present invention implements a rectangular stopband by using two electromagnetic bandgap (EBG) elements on a coplanar waveguide (CPW) feeder of an ultra-wideband antenna. This method places the EBG structure on the feeder without affecting the current distribution of the radiator, and does not need to consider the influence of the stop band design unit on the antenna radiation during design; moreover, this method can be changed by changing the parameters of the electromagnetic bandgap (EBG) structure The stopband frequency improves optimization efficiency and saves system resources and design efficiency; and the ultra-wideband stopband antenna provided in this embodiment has a rectangular stopband characteristic and can be applied to ultra-wideband systems in different interference environments.

Embodiment two:

Another ultra-wideband bandstop antenna with rectangular stopband characteristics, as shown in Figure 12-14, is a microstrip waveguide antenna, including an ultra-wideband (UWB) antenna body and at least two electromagnetic bandgap (EBG) structures 5.

The structure of the ultra-wideband antenna body is the same as or similar to that of the existing microstrip antenna, and consists of a dielectric substrate 1 , a metal floor 2 , a signal line 3 and a radiator 4 . The radiator 4 and the signal line 3 are attached to the upper surface of the dielectric substrate 1 and located in the middle of the dielectric substrate 1 , and the radiator 4 is connected to one end of the signal line 3 . The combination of the two is T-shaped. The metal floor 2 is attached to the lower surface of the dielectric substrate 1, opposite to the position of the signal line 3, and only covers the area where the signal line 3 is located. The metal floor 2 and the signal line 3 form a microstrip waveguide. The shape of the radiator 4 can be designed as required, such as circular, oval, square, rectangular, triangular or other shapes. The shape of the signal line 3 is a long straight strip. The two metal floor plates 2 are both rectangular in shape and of the same size. The heights of the two metal floors 2 are both less than or equal to the length of the signal line 3 . In this embodiment, the radiator 4 adopts an elliptical patch structure, and is fed by a microstrip waveguide formed by the metal floor 2 and the signal line 3 . The radiator 4 and the signal line 3 are located on the same surface of the dielectric substrate 1 .

Each electromagnetic bandgap structure 5 is composed of a metal patch 5-1 and a short-circuit pin 5-2. The metal patch 5 - 1 is attached on the upper surface of the dielectric substrate 1 . One end of the short-circuit pin 5-2 is connected to the metal patch 5-1, and the other end is connected to the metal floor 2 of the UWB antenna body through the dielectric substrate 1. The metal floor 2 is simultaneously used as the electromagnetic bandgap structure 5 and the floor of the UWB antenna body. The number of electromagnetic bandgap structures 5 is determined according to the requirement of the stopband width, and the wider the stopband width is, the more the number of electromagnetic bandgap structures 5 is. During specific layout, every two electromagnetic bandgap structures 5 need to be separated from each other by a certain distance. In order to enable the antenna to have stop-band characteristics, the electromagnetic bandgap structures 5 should be located on or near the feeder line of the antenna, specifically, all the electromagnetic bandgap structures 5 are distributed on the same side of the signal line 3 . The shape of the metal patch 5-1 is set according to needs, and can be circular, oval, square, rectangular, triangular or other shapes, and the size is designed according to design requirements. When the short-circuit pin 5-2 is connected to the metal patch 5-1, it can be connected in the middle of the metal patch 5-1 or anywhere on the metal patch 5-1, but in order to improve performance, the short-circuit pin 5-2 should be as far as possible Connect to the edge of the side of the metal patch 5-1 close to the signal line 3. The short-circuit pin 5 - 2 can penetrate the dielectric substrate 1 obliquely or vertically. The sizes of the metal patches 5 - 1 of all the electromagnetic bandgap structures 5 are different. By adjusting the size parameters of the electromagnetic bandgap structures 5 , a stopband of any frequency band can be realized. The resonant frequencies of the electromagnetic bandgap structures 5 are similar, forming a rectangular stop band.

In this embodiment, the metal patch 5-1 adopts a rectangular structure. The shorting pin 5 - 2 is perpendicular to the plane where the metal patch 5 - 1 and the signal line 3 are located, and is embedded in the dielectric substrate 1 . In order to obtain better performance and smaller size, the short-circuit pin 5-2 is arranged at the edge of the metal patch 5-1. In order to obtain a rectangular stop band, this embodiment includes two electromagnetic bandgap structures 5 , namely two metal patches 5 - 1 and two shorting pins 5 - 2 . Both the first metal patch 5-1 and the second metal patch 5-1 are located on the same side of the signal line 3, one end of the first short-circuit pin 5-2 is connected to the first metal patch 5-1, and the other end is connected to the metal floor 2. One end of the second short-circuit pin 5-2 is connected to the second metal patch 5-1, and the other end is also connected to the metal floor 2. The resonant frequencies of the two electromagnetic bandgap structures 5 are close to each other to form a rectangular characteristic stop band. By adjusting the size of the two metal patches 5-1, the frequency of the rectangular characteristic stop band can be adjusted, and the width of the rectangular characteristic stop band can also be adjusted, so that the optimized performance of the ultra-wideband band stop antenna meets the requirements for suppressing different narrow bands crosstalk band requirements.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it still The technical solutions described in the foregoing embodiments may be modified, or some or all of the technical features may be equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention. .

Claims (10)

1. An ultra-wideband band-rejection antenna with a rectangular stop-band characteristic, comprising an ultra-wideband antenna body, the ultra-wideband antenna body comprising a dielectric substrate (1) and 2 metal floors (2) attached to the upper surface of the dielectric substrate (1) ), a signal line (3) and a radiator (4); wherein the radiator (4) and the signal line (3) are located in the middle of the dielectric substrate 1, and the radiator (4) is connected to one end of the signal line (3); The two metal floors (2) are located on the left and right sides of the signal line (3); the coplanar waveguide formed by the metal floor (2) and the signal line (3); is characterized in that it further includes at least 2 spaced apart Electromagnetic bandgap structure (5); Each electromagnetic bandgap structure (5) is composed of a metal patch (5-1) and a short-circuit pin (5-2); the metal patch (5-1) is attached to the lower surface of the dielectric substrate (1); the short-circuit One end of the pin (5-2) is connected to the metal patch (5-1), and the other end is connected to the signal line (3) or the radiator (4) of the UWB antenna body through the dielectric substrate (1). 2. The ultra-wideband bandstop antenna with rectangular stopband characteristics according to claim 1, characterized in that: the sizes of the metal patches (5-1) of all electromagnetic bandgap structures (5) are different. 3. the ultra-wide band band stop antenna with rectangular stop band characteristic according to claim 1, is characterized in that: short-circuit pin (5-2) is connected to metal patch (5-1) near signal line (3) side edge. 4. The ultra-wide band stop antenna with rectangular stop band characteristics according to claim 1, characterized in that: the short-circuit pin (5-2) vertically passes through the dielectric substrate (1). 5. the ultra-wide band band stop antenna with rectangular stop band characteristic according to claim 1, is characterized in that: the other end of the short-circuit pin (5-2) of all electromagnetic bandgap structures (5) is all connected with signal line (3 ); or the other end of the short-circuit pin (5-2) of all electromagnetic bandgap structures (5) is connected to the radiator (4); or the short-circuit pin (5-2) of a part of the electromagnetic bandgap structure (5) The other ends are connected to the signal line (3), and the other ends of the short-circuit pins (5-2) of the other electromagnetic bandgap structure (5) are connected to the radiator (4). 6. An ultra-wideband band-stop antenna with rectangular stop-band characteristics, including an ultra-wideband antenna body, which consists of a dielectric substrate (1), a metal floor (2), a signal line (3) and a radiator (4) ; wherein the radiator (4) and the signal line (3) are attached to the upper surface of the dielectric substrate (1), and the radiator (4) is connected to one end of the signal line (3); the metal floor (2) is attached to the medium The lower surface of the substrate (1); a microstrip waveguide composed of a metal floor (2) and a signal line (3); characterized in that it further includes at least two electromagnetic bandgap structures (5) arranged at intervals; Each electromagnetic bandgap structure (5) is composed of a metal patch (5-1) and a short-circuit pin (5-2); the metal patch (5-1) is attached to the upper surface of the dielectric substrate (1); the short-circuit One end of the pin (5-2) is connected to the metal patch (5-1), and the other end is connected to the metal floor (2) of the UWB antenna body through the dielectric substrate (1). 7. The ultra-wideband bandstop antenna with rectangular stopband characteristics according to claim 6, characterized in that: the sizes of the metal patches (5-1) of all the electromagnetic bandgap structures (5) are different. 8. The ultra-wide band band stop antenna with rectangular stop band characteristics according to claim 6, characterized in that: the short-circuit pin (5-2) is connected to one side of the metal patch (5-1) close to the signal line (3). side edge. 9. The ultra-wideband band stop antenna with rectangular stop band characteristics according to claim 6, characterized in that: the short-circuit pin (5-2) vertically passes through the dielectric substrate (1). 10. The ultra-wideband bandstop antenna with rectangular stopband characteristics according to claim 6, characterized in that: all electromagnetic bandgap structures (5) are located on the same side of the signal line (3).