A cross-coupled microstrip resonator antenna and array thereof

Abstract

The application provides a cross-coupled microstrip filter vibrator antenna and an array thereof, and belongs to the field of large phased array radar systems, and comprises an antenna feed port, a reflector plate, a suspended cross-coupled microstrip circuit board, a filter cover plate and metal vibrator arms. The filter cover plate is located on the upper surface of the reflector plate and forms a suspended air cavity together with the reflector plate. The suspended cross-coupled microstrip circuit board is located in the suspended air cavity. The inner conductor of the antenna feed port extends into the suspended air cavity and is connected with the suspended cross-coupled microstrip circuit board. The outer conductor is connected with the reflector plate. The metal vibrator arms are located on the filter cover plate. One of the metal vibrator arms is connected with the suspended cross-coupled microstrip circuit board, and the other is grounded. The radiation characteristics are realized directly on the filter cover plate. The suspended broadband high-pass filter is used to realize high suppression of the lower sideband. The original filtering performance of the filter is not changed, the profile height is basically maintained, a wider working bandwidth is realized, and the interference problem of a secondary radar on a primary radar is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical fields of large phased array radar systems and microwave communication, satellite communication systems, and particularly relates to a cross-coupled microstrip filter dipole antenna and an array thereof. BACKGROUND

[0002] In the prior art, especially in the centimeter frequency band and large high-power phased array radar systems, in order to eliminate the interference of the auxiliary radar to the main radar, a high-pass or band-pass filter is generally installed in the main radar antenna feeder system (between DAM and the antenna). The filter and the antenna, as important components in front of the radar array, are structural parts and are related to frequency. The volume of the filter is also related to factors such as working frequency, working bandwidth, suppression degree, and power tolerance. The more the number of radar channels is, the larger the volume and weight of the filter in the antenna feeder system will be, which greatly affects the mobility of the radar and also increases the loss. The higher the suppression degree requirement is, the greater the loss will be. Even some systems increase the connection of cables between the filter and the antenna, which cannot be ignored in terms of the impact on the loss and weight of the system. The present application is a cross-coupled microstrip filter dipole antenna developed to solve the problem of interference of the auxiliary radar to the main radar in the centimeter wave frequency band and digital phased array radar systems. SUMMARY

[0003] The technical problem to be solved by the present application is to provide a cross-coupled microstrip filter dipole antenna that solves the problem of interference of the auxiliary radar to the main radar in the digital phased array radar system without increasing additional filter structures and matching circuits.

[0004] The present application solves the above technical problems by the following technical scheme: a cross-coupled microstrip filter dipole antenna, comprising an antenna feed port, a reflector plate, a suspended cross-coupled microstrip circuit board, a filter cover plate, and a metal dipole arm. The filter cover plate is located on the upper surface of the reflector plate and forms a suspended air cavity with the reflector plate. The suspended cross-coupled microstrip circuit board is located in the suspended air cavity. The inner conductor of the antenna feed port extends into the suspended air cavity and is connected to the suspended cross-coupled microstrip circuit board. The outer conductor of the antenna feed port is connected to the reflector plate. The metal dipole arm is located on the filter cover plate. One of the radiation arms in the metal dipole arm is connected to the suspended cross-coupled microstrip circuit board. The other radiation arm in the metal dipole arm is grounded.

[0005] The application embeds an antenna unit on the cover plate of the cross-coupled wideband high-pass filter, i.e. designs a balanced-unbalanced feed structure and a metal dipole arm on the shell of the high-pass filter metal cavity, the balanced-unbalanced feed structure is used for wide-scan impedance matching, the metal dipole arm is used for electromagnetic wave radiation, the radiation characteristics are directly realized on the suspended wideband high-pass filter cover plate, the lower sideband high suppression of the suspended wideband high-pass filter is utilized, the wideband working characteristics of the antenna are met without changing the original filtering performance of the high-pass filter and basically maintaining the profile height, a wider working bandwidth than the coaxial cavity band-pass filter is realized, the function of radiating electromagnetic waves is increased, compared with the traditional connection between the antenna unit and the filter through the radio frequency cable assembly, when the auxiliary radar frequency suppression is 50 dB, the system loss can be reduced by 0.5 dB, and the physical size sharing profile height is reduced by about one quarter of the lowest frequency wavelength.

[0006] Preferably, the metal dipole arm is parasitic on the side wall of the filter cover plate, and the spacing between the metal dipole arm and the reflector plate is one quarter of the low frequency wavelength.

[0007] Preferably, the suspended cross-coupled microstrip circuit board comprises a high-frequency microstrip dielectric plate, the front surface of the high-frequency microstrip dielectric plate is etched with a main circuit, and the back surface is etched with a cross-coupled circuit, one end of the main circuit is connected with one of the radiation arms of the metal dipole arm, and the other end of the main circuit is connected with the inner conductor of the antenna feed port.

[0008] Preferably, the dielectric constant of the high-frequency microstrip dielectric plate is 2.94, and the vertical height between the metal dipole arm and the upper surface of the reflector plate is 30.3 mm.

[0009] Preferably, the main circuit adopts the form of series capacitors and parallel inductors on the front surface of the high-frequency microstrip dielectric plate, the cross-coupled circuit adopts the form of two SIR step capacitors and inductors connected in parallel to the main circuit to realize cross-coupling and form a transmission zero point.

[0010] Preferably, the antenna feed port is a probe or a connector, and the characteristic impedance of the feed port is 50 ohms; when the antenna feed port is a connector, the inner conductor of the connector extends into the suspended air cavity and is connected with the main circuit to realize the feed of the dipole antenna, and the outer conductor of the connector is connected with the reflector plate to realize grounding.

[0011] Preferably, the other radiation arm of the metal dipole arm is connected with the reflector plate through a U-shaped choke groove to realize grounding.

[0012] Preferably, the metal dipole arm is in the shape of a straight line or an umbrella; when it is in the shape of a straight line, the metal dipole arm is vertically fixed on the filter cover plate; and when it is in the shape of an umbrella, the metal dipole arm is fixed on the filter cover plate at an angle relative to the mounting surface of the filter cover plate.

[0013] The application also provides a cross-coupled microstrip filter dipole antenna array, which is composed of a plurality of the cross-coupled microstrip filter dipole antennas, and is an M*N or N*M element antenna array, M is greater than or equal to N, and a spacer is arranged between adjacent dipole antennas arranged in the Y direction.

[0014] Preferably, an integrated antenna cover is arranged above each dipole antenna.

[0015] The application provides the following advantages:

[0016] (1) The application nests an antenna unit on the cover plate of the cross-coupled wideband high-pass filter, i.e., a balanced-unbalanced feed structure and a metal dipole arm are designed on the outer shell of the high-pass filter metal cavity, the balanced-unbalanced feed structure is used for wideband impedance matching, and the metal dipole arm is used for electromagnetic wave radiation. The radiation characteristics are realized directly on the cover plate of the suspended wideband high-pass filter, the lower sideband high suppression of the suspended wideband high-pass filter is utilized, the wideband working characteristics of the antenna are met without changing the original filtering performance of the high-pass filter and basically maintaining the profile height, a wider working bandwidth than the coaxial cavity band-pass filter is realized, the function of radiating electromagnetic waves outward is increased, compared with the connection between the traditional antenna unit and the filter through the radio frequency cable assembly, when the auxiliary radar frequency suppression is 50 dB, the system loss can be reduced by 0.5 dB, and the physical size sharing profile height is reduced by about one fourth of the wavelength of the lowest frequency.

[0017] (2) The application mainly aims at the upper side near zone stray band high suppression, realizes the low profile and high efficiency radiation of the phased array radar system, fully utilizes the cavity structure of the filter, nests the two radiation arms of the dipole antenna on the shell of the cross-coupled high-pass filter, realizes the integrated design of the antenna and the filter, forms the cross-coupled high-performance filter dipole antenna, and integrates the small-loss high-suppression high-pass suspended filter, the antenna dipole radiation arm and the antenna cover. The entire antenna profile height is only half of the original system design height, which can meet the radiation conditions of the dipole antenna and the cavity size requirements of the high-pass filter, i.e., the two structural devices share the same height, which meets the high-efficiency radiation of the antenna unit in the electrical performance and solves the interference problem of the auxiliary radar on the main radar antenna. The cross-coupled microstrip filter dipole antenna provides the following advantages: the total weight of the structure is reduced, the profile height of the radar system is reduced, the radar system architecture is simplified, the integration degree of the system is improved, and the radiation efficiency of the whole machine is improved.

[0018] (3) The antenna feed port of the application adopts a connector, and the vibrator antenna is directly connected with the DAM assembly or the SUM assembly through the connecting piece in a plug-in blind way, so that the single-path antenna is quickly plugged and pulled, and integrated connection is realized, the array microwave device composition is greatly simplified, the number of cables and connectors is reduced, and the structure support and heat dissipation equipment of the filter are also reduced, so as to improve the system reliability, realize the modularization and expansion, provide convenience for automatic contraction and expansion of the antenna array, and meet the high mobility requirement of shipborne and airborne radars.

[0019] (4) The vibrator antenna of the application directly installs the filter above the reflecting plate, and utilizes the space efficient natural heat dissipation, without additionally setting the heat dissipation structure. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 The schematic diagram of the cross-coupled microstrip filter vibrator antenna provided by the embodiment of the application is shown in the figure.

[0021] Figure 2 The position schematic diagram of the suspended cross-coupled microstrip circuit board in the cross-coupled microstrip filter vibrator antenna provided by the embodiment of the application is shown in the figure.

[0022] Figure 3 The front surface schematic diagram of the suspended cross-coupled microstrip circuit board in the cross-coupled microstrip filter vibrator antenna provided by the embodiment of the application is shown in the figure.

[0023] Figure 4 The back surface schematic diagram of the suspended cross-coupled microstrip circuit board in the cross-coupled microstrip filter vibrator antenna provided by the embodiment of the application is shown in the figure.

[0024] Figure 5 The schematic diagram of the cross-coupled microstrip filter vibrator antenna forming a 5*5 array provided by the embodiment of the application is shown in the figure.

[0025] Figure 6 The filter circuit standing wave diagram of the cross-coupled microstrip filter vibrator antenna provided by the embodiment of the application is shown in the figure.

[0026] Figure 7 The filter effect diagram of the cross-coupled microstrip filter vibrator antenna provided by the embodiment of the application is shown in the figure.

[0027] Figure 8 The gain diagram of the cross-coupled microstrip filter vibrator antenna provided by the embodiment of the application is shown in the figure.

[0028] Figure 9 The lobe diagram of the cross-coupled microstrip filter vibrator antenna provided by the embodiment of the application is shown in the figure.

[0029] In the figure: 1 antenna feed port, 2 reflector plate, 3 suspended air cavity, 4 suspended cross-coupled microstrip circuit board, 41 main circuit, 42 cross-coupled circuit, 5 filter cover plate, 6 metal dipole arm, 7 isolation rod, 8 integrated antenna cover. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the present application more clear, the technical scheme of the present application is described clearly and completely below in combination with specific embodiments and with reference to the drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0031] It is well known that the antenna and the filter are the two most important components in the radio frequency front-end circuit. The traditional design method only focuses on the design of the components themselves. After the two components are cascaded in the system, they cannot be completely matched, and the circuit size is large. Designing the antenna and the filter as a whole component into a filter antenna not only has the functions of radiation, impedance matching, filtering and balance conversion, but also can reduce the circuit size and make the system structure more compact, which has important practical value.

[0032] The filter synthesis method is still suitable for the design of the cross-coupled microstrip filter dipole antenna, and in recent years has attracted the attention of many scholars. In the public data, there are reports of isolated microstrip antenna units and microstrip filter designs on the same PCB board or layered design on a multi-layer PCB board. However, there is no report of the integration of metal dipole antennas and cross-coupled filters. After direct cascading, the antenna reflection coefficient is poor, the two components are not completely matched, the loss is large, and the near-zone stray field is difficult to effectively suppress, which is difficult to meet the harsh engineering use requirements. In order to meet the engineering application requirements, the present application provides a cross-coupled microstrip filter dipole antenna, and the specific scheme is introduced as follows:

[0033] As shown in Figure 1 and Figure 2 , the present embodiment provides a cross-coupled microstrip filter dipole antenna, which comprises an antenna feed port 1, a reflector plate 2, a suspended cross-coupled microstrip circuit board 4, a filter cover plate 5, and a metal dipole arm 6. The filter cover plate 5 is located on the upper surface of the reflector plate 2 and forms a suspended air cavity 3 together with the reflector plate 2. The suspended cross-coupled microstrip circuit board 4 is located in the suspended air cavity 3. The inner conductor of the antenna feed port 1 extends into the suspended air cavity 3 and is connected with the suspended cross-coupled microstrip circuit board 4. The outer conductor of the antenna feed port 1 is connected with the reflector plate 2. The metal dipole arm 6 is located on the filter cover plate 5. One of the radiation arms in the metal dipole arm 6 is connected with the suspended cross-coupled microstrip circuit board 4, and the other radiation arm in the metal dipole arm 6 is grounded.

[0034] The cross-coupled microstrip filter resonator antenna is suitable for working in the upper sideband of the auxiliary radar, is applicable to the radar system with wide working frequency band, and has the suppression of the auxiliary radar of more than 50dB, the metal resonator arm 6 is parasitic on the side wall of the filter cover plate 5, the structure size of the cross-coupled microstrip filter satisfies the low-frequency quarter-wavelength electrical size between the resonator antenna and the reflector plate, the best radiation condition is reached, and the integrated cross-coupled microstrip filter resonator antenna is formed.

[0035] The filter cover plate 5 is equivalent to two plates, and one radiation arm is respectively grown out. When the suspension cross-coupled microstrip circuit board 4 is assembled with the filter cover plate 5, the suspension cross-coupled microstrip circuit board 4 is pressed between the two cover plates, and the two ends of the suspension cross-coupled microstrip circuit board 4 are respectively pressed on the ends of the two cover plates.

[0036] As shown in Figure 3 and Figure 4 , the suspension cross-coupled microstrip circuit board 4 includes a high-frequency microstrip dielectric plate, and the front and back surfaces of the high-frequency microstrip dielectric plate are etched with filter circuits. The front surface is etched with a main circuit 41, and the back surface is etched with a cross-coupled circuit 42. One end circuit of the main circuit 41 is connected with one radiation arm in the metal resonator arm 6, and the other end circuit of the main circuit 41 is connected with the inner conductor of the antenna feed port 1.

[0037] In the frequency range of 1.6GHz-9.7GHz, when the dielectric constant of the selected high-frequency microstrip dielectric plate is 2.94, the vertical height between the metal resonator arm 6 and the upper surface of the reflector plate 2 is 30.3mm, as shown in Figure 6 , the antenna standing wave ratio is less than 2, as shown in Figure 8 , the unit gain is about 4.9dB at the working frequency point f1, as shown in Figure 9 , the 3dB beam width E-plane beam width≥140°, and H-plane beam width≥80°, which meets the corresponding scanning requirements of the phased array radar in the azimuth and elevation planes.

[0038] The main circuit 41 adopts the form of series capacitors and parallel inductors on the front surface of the high-frequency microstrip dielectric plate, the cross-coupled circuit 42 adopts two SIR step capacitors and inductors in parallel to be coupled with the main circuit 41, to realize cross-coupling, form transmission zeros, and achieve the suppression on the required frequency band. The number of zeros can be selected according to the size of the suppression degree. In this embodiment, the auxiliary radar frequency band is mainly suppressed, from Figure 7 It can be seen that the suppression in the auxiliary radar frequency band is more than 50dB, and the first suppression zero value is as high as 75dB.

[0039] The antenna feed port 1 is a probe or connector, the feed port characteristic impedance is 50 ohms, the inner conductor of the connector extends into the suspended air cavity 3 and is connected with the main circuit 41, directly feeds the cross-coupled microstrip filter resonator antenna, and the outer conductor of the connector is connected with the bottom of the reflector plate 2 to realize good grounding. The connector can adopt a BMA blind connector, the blind connector model is matched with the DAM digital transceiver assembly connector joint, the connector structure is connected with the DAM digital transceiver assembly in a blind insertion mode, realizes quick plugging and radio frequency connection between devices, and facilitates system installation and use and maintenance. The single-channel antenna realizes quick plugging and integrated connection, and meets the high mobility requirements of large phased array radars. By using the characteristics that the working frequency band of the main radar antenna is higher than that of the auxiliary radar, a relatively appropriate unit spacing is set, the channel spacing of the DAM transceiver assembly or the SUM assembly is set, the DAM transceiver assembly or the SUM assembly is quickly connected and plugged with the cross-coupled microstrip filter resonator antenna. According to the basic module layout of the array, the cross-coupled microstrip filter resonator antenna is directly connected with the DAM assembly or the SUM assembly in a blind insertion mode, greatly simplifies the composition of the array microwave device, reduces the number of cables and connectors, and the structure support and heat dissipation equipment of the filter. In order to improve the system reliability, realize modularization and expansion, facilitate the automatic contraction and expansion of the antenna array, and meet the high mobility requirements of shipborne and airborne radars.

[0040] Another radiation arm in the metal resonator arm 6 is connected with the reflector plate 2 through a U-shaped choke groove to realize grounding. The circuit antenna radiation arm is parasitic on the cross-coupled cavity filter shell through the U-shaped choke groove, and can realize in-band signal radiation and high rejection of stop-band signals.

[0041] The metal resonator arm 6 is in a linear or umbrella shape. When it is in a linear shape, the metal resonator arm 6 is vertically fixed on the filter cover plate 5. When it is in an umbrella shape, the metal resonator arm 6 is fixed on the filter cover plate 5 at an angle relative to the mounting surface of the filter cover plate 5.

[0042] The application embeds an antenna unit on a cover plate of a cross-coupled broadband high-pass filter, i.e., derives a balanced-unbalanced feed structure and a metal dipole arm on the shell of the high-pass filter metal cavity, the balanced-unbalanced feed structure is also called a feed balun and is used for wide-scan impedance matching, and the metal dipole arm is used for electromagnetic wave radiation, in the case of not changing the original filtering performance of the high-pass filter and basically maintaining the profile height, the function of radiating electromagnetic waves outward is increased. The performance matching design between the filter and the antenna unit and the collaborative design of the appearance size are mainly broken through, compared with the traditional connection between the antenna unit and the filter through a radio frequency cable assembly, when the auxiliary radar frequency is suppressed by 50 dB, the system loss can be reduced by 0.5 dB, the physical size shared profile height is reduced by about one fourth of the lowest frequency wavelength, the working bandwidth of the filter antenna can be designed according to different requirements of the radar, the interference problem of the auxiliary radar on the main radar in the digital phased array radar system is solved without increasing additional filter structures and matching circuits, the radar system architecture is simplified, and the system integration is improved.

[0043] The radiation effect of the antenna is equivalent to that of the original dipole antenna (the original dipole antenna refers to the structure without the suspended cross-coupled microstrip circuit board 4 in the middle), and still has all the characteristics of the dipole pattern, the unit gain and the lobe width are equivalent to those of the original dipole antenna, and after arraying, two-dimensional wide-angle scanning of the digital phased array radar can be realized. Figure 1

[0044] The application also provides a cross-coupled microstrip filter dipole antenna array, which is arranged by a plurality of cross-coupled microstrip filter dipole antenna arrays and composed of an M*N or N*M element antenna array, M is greater than or equal to N, and a spacer 7 is arranged between adjacent dipole antennas arranged along the Y-axis direction and fixed to the upper surface of the reflector plate 2.

[0045] The antenna array composed of the antenna of the application can simplify the structural complexity of the phased array radar, reduce the profile height of the whole machine, greatly simplify the microwave system architecture, reduce the variety and quantity of radio frequency microwave components, seamlessly connect each component, do not need radio frequency cable connection, greatly reduce the feeder loss, reduce the circuit size, reduce the weight of the radio frequency front end, and improve the efficiency of the whole machine and the power of the radar.

[0046] In this embodiment, a 5*5 square grid antenna array is arranged by using the cross-coupled microstrip filter dipole antenna, and the stop band suppression effect after the antenna unit is arrayed is verified, the horizontal unit spacing is 50 mm, the vertical unit spacing is 50 mm, and the arraying diagram is as shown in Figure 5 ​The main lobe gain is 19.35dB at the fundamental frequency f1 working frequency point, and the target frequency suppression is up to 70dB, which well meets the anti-interference requirements of the radar, and does not need to additionally increase a high-power cavity filter, an aperture conversion, a cable, a filter support and the like in each feed system. Thus, the equipment quantity of the phased array radar and the unreliability caused by excessive connection are greatly reduced. The length of two microwave device structures is optimized and shared, the high integration, miniaturization and light weight design of the radar system are realized, the radar system radio frequency loss is greatly reduced, and the radar whole machine working efficiency is improved. The filter and the radiating function are simultaneously provided by the filter radiating element antenna, the filter radiating element antenna can be widely applied to the advanced phased array radar system, the filter radiating element antenna has simple structure, high reliability and strong system integration degree. The filter radiating element antenna has low loss, medium power resistance and optimal design effect in terms of electrical performance indexes and structural design. The filter radiating element antenna can also be applied to the vehicle-mounted and ship-mounted satellite communication systems, and can provide technical accumulation and valuable design experience for future other similar pre-research or products. The filter radiating element antenna has high universality and practicality.

[0047] The existing filter is installed in a feed box through a cable, and the heat dissipation problem under high power after combination needs to be considered, while the filter and the antenna are directly placed above the reflecting plate 2 in the present application, and the heat dissipation structure does not need to be considered, and the space is used for efficient and natural heat dissipation. An integrated antenna cover 8 is arranged above each radiating element antenna, the integrated antenna cover 8 can adopt a thin-wall wave-transparent cover, is installed on the main feed cavity and performs engineering protection on the whole antenna, and the whole cover can also be additionally installed for protection after arraying. The antenna cover is integrated in the axial direction of the cross-coupled microstrip filter radiating element antenna, and is integrated with the cross-coupled microstrip filter, so that the filter radiating element antenna can be effectively protected without relying on a large antenna cover, and the whole feed system does not need additional heat dissipation equipment under high power conditions, and the suspended high-integration filter radiating element antenna can be efficiently radiated and dissipated through the natural heat dissipation mode.

[0048] The above embodiments are only used to illustrate the technical solutions of the present application, but not limit the present application; although the present application is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced by equivalents; and the modification or replacement does not make the essence of the corresponding technical solution deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A cross-coupled microstrip resonator antenna, characterized by: The antenna feed port, the reflector plate, the suspended cross-coupled microstrip circuit board, the filter cover plate, the metal dipole arm, the filter cover plate is located on the upper surface of the reflector plate and is enclosed with the reflector plate to form a suspended air cavity, the suspended cross-coupled microstrip circuit board is located in the suspended air cavity, the inner conductor of the antenna feed port extends into the suspended air cavity and is connected with the suspended cross-coupled microstrip circuit board, the outer conductor of the antenna feed port is connected with the reflector plate, the metal dipole arm is located on the filter cover plate, one of the radiation arms in the metal dipole arm is connected with the suspended cross-coupled microstrip circuit board, and the other radiation arm in the metal dipole arm is grounded.

2. The cross-coupled microstrip resonator antenna according to claim 1, characterized in that: The metal dipole arm is parasitic on the side wall of the filter cover plate, and the spacing between the metal dipole arm and the reflector plate is a low-frequency quarter wavelength.

3. The cross-coupled microstrip resonator antenna of claim 1, wherein: The dielectric constant of the high-frequency microstrip dielectric plate is 2.94, and the vertical height between the metal dipole arm and the upper surface of the reflector plate is 30.3 mm.

4. The cross-coupled microstrip resonator antenna of claim 1, wherein: The antenna feed port is a probe or a connector, and the characteristic impedance of the feed port is 50 ohms. When the antenna feed port is a connector, the inner conductor of the connector extends into the suspended air cavity and is connected with the main circuit to feed the dipole antenna, and the outer conductor of the connector is connected with the reflector plate to realize grounding.

5. The cross-coupled microstrip resonator antenna of claim 1, wherein: The other radiation arm in the metal dipole arm is connected with the reflector plate through a U-shaped choke groove to realize grounding.

6. The cross-coupled microstrip resonator antenna of claim 1, wherein: The metal dipole arm is in the shape of a character or an umbrella. When it is in the shape of a character, the metal dipole arm is vertically fixed on the filter cover plate, and when it is in the shape of an umbrella, the metal dipole arm is fixed on the filter cover plate at an angle relative to the mounting surface of the filter cover plate.

7. A cross-coupled microstrip resonator antenna array, characterized by: The MxN or NxM element antenna array is composed of a plurality of cross-coupled microstrip filter dipole antennas according to any one of claims 1-6, M≥N, and a spacer is arranged between adjacent dipole antennas arranged in the Y direction, and the spacer is fixed on the upper surface of the reflector plate.

8. The cross-coupled microstrip resonator antenna array of claim 7, wherein: An integrated antenna cover is arranged above each dipole antenna.

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