Reconfigurable ultra-wideband dipole antenna and communication system

Abstract

The present invention discloses a reconfigurable ultra-wideband dipole antenna and a communication system. The reconfigurable ultra-wideband dipole antenna includes: a first radiation section, a second radiation section and a third radiation section arranged in sequence; a first switching matcher, located between the first radiation section and the second radiation section, electrically connected to the first radiation section and the second radiation section respectively, for controlling the working mode of the first radiation section and the second radiation section; a second switching matcher, located between the second radiation section and the third radiation section, electrically connected to the second radiation section and the third radiation section respectively, for controlling the working mode of the second radiation section and the third radiation section; wherein the working mode includes a high-frequency dipole antenna mode composed of the first radiation section and the second radiation section, and a low-frequency dipole antenna mode composed of the first radiation section, the second radiation section and the third radiation section. The embodiment of the present invention can ensure the gain and reliability of the antenna and reduce the volume of the antenna on the basis of ensuring the working frequency bandwidth of the antenna.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of communication technology, and in particular to a reconfigurable ultra-wideband dipole antenna and a communication system. Background Art

[0002] Antennas, as devices for converting electrical signals into electromagnetic wave signals, are essential components in wireless communication systems. At present, in the context of the new generation of communication technology (software radio) and the need to prevent confidentiality or interference during frequency hopping radio communication, the requirements for the working frequency bandwidth of antennas are becoming wider and wider. In the prior art, reconfigurable technology has been valued for its flexible switching and wide coverage frequency band, but the existing reconfigurable ultra-wideband antennas are usually complex in structure, large in size, with high loss and poor reliability. Summary of the invention

[0003] The embodiment of the present invention provides a reconfigurable ultra-wideband dipole antenna and a communication system, so as to ensure the gain and reliability of the antenna and reduce the size of the antenna while ensuring the working frequency bandwidth of the antenna.

[0004] In a first aspect, an embodiment of the present invention provides a reconfigurable ultra-wideband dipole antenna, comprising:

[0005] A first radiation section, a second radiation section and a third radiation section are arranged in sequence;

[0006] A first switching matcher is located between the first radiation section and the second radiation section; and the first switching matcher is electrically connected to the first radiation section and the second radiation section respectively, and is used to control the working mode of the first radiation section and the second radiation section;

[0007] A second switching matcher is located between the second radiation segment and the third radiation segment; and the second switching matcher is electrically connected to the second radiation segment and the third radiation segment, respectively, for controlling the working modes of the second radiation segment and the third radiation segment; wherein the working modes include a high-frequency band dipole antenna mode formed by the first radiation segment and the second radiation segment, and a low-frequency band dipole antenna mode formed by the first radiation segment, the second radiation segment and the third radiation segment.

[0008] Optionally, the first switching matcher includes:

[0009] A first matching module;

[0010] A first switch module; a first end of the first switch module is electrically connected to the first radiation segment, a second end of the first switch module is electrically connected to the first end of the first matching module, and a third end of the first switch module is electrically connected to the second radiation segment;

[0011] A second switch module; a first end of the second switch module is electrically connected to a second end of the first matching module, and a second end of the second switch module is electrically connected to the second radiation segment.

[0012] Optionally, the first switching matcher includes:

[0013] A first matching module; a first end of the first matching module is electrically connected to the first radiation segment;

[0014] a third switch module; a first end of the third switch module is electrically connected to the second radiation segment, a second end of the third switch module is electrically connected to the second end of the first matching module, and a third end of the third switch module is electrically connected to the first radiation segment.

[0015] Optionally, the input end of the first switching matcher is electrically connected to the output end of the radio station; wherein the output signal of the output end of the radio station includes: a radio frequency signal and a DC voltage signal;

[0016] The first switching matcher also includes:

[0017] A signal separation module, comprising an input end, a first output end, and a second output end; the input end of the signal separation module is electrically connected to the output end of the radio station; the first output end of the signal separation module outputs the radio frequency signal, and the second output end of the signal separation module outputs the DC voltage signal;

[0018] The fourth switch module includes a control end, a first end, a second end and a third end; the control end of the fourth switch module is electrically connected to the second output end of the signal separation module, the first end of the fourth switch module is electrically connected to the first output end of the signal separation module, the second end of the fourth switch module is electrically connected to the third end of the first matching module, and the third end of the fourth switch module is electrically connected to the second switching matcher.

[0019] Optionally, the fourth switch module includes: a first inductor, a first diode and a second diode; the first end of the first inductor is connected to the DC voltage signal, and the second end of the first inductor is electrically connected to the first output end of the signal separation module, the cathode of the first diode and the anode of the second diode respectively; the anode of the first diode is electrically connected to the second switching matcher; the cathode of the second diode is electrically connected to the third end of the first matching module.

[0020] Optionally, the second switching matcher includes:

[0021] A fifth switch module; a control end of the fifth switch module is connected to the DC voltage signal, and a first end of the fifth switch module is electrically connected to the second radiation segment;

[0022] a second matching module; a first end of the second matching module is electrically connected to the second end of the fifth switch module, a second end of the second matching module is electrically connected to the third radiation segment, and a third end of the second matching module is electrically connected to the third end of the fourth switch module.

[0023] Optionally, the fifth switch module includes: a second inductor and a third diode; the first end of the second inductor is connected to the DC voltage signal, and the second end of the second inductor is electrically connected to the cathode of the third diode and the first end of the second matching module respectively; the anode of the third diode is electrically connected to the second radiation segment.

[0024] In a second aspect, an embodiment of the present invention further provides a communication system, including: a radio station and a reconfigurable ultra-wideband dipole antenna as provided in any embodiment of the present invention.

[0025] Optionally, the station includes:

[0026] A voltage output module comprises a control terminal, a first input terminal, a second input terminal and an output terminal; the control terminal of the voltage output module is connected to an output control signal, the first input terminal of the voltage output module is connected to a negative voltage, and the second input terminal of the voltage output module is connected to a positive voltage;

[0027] The signal combining module comprises a first input terminal, a second input terminal and an output terminal; the first input terminal of the signal combining module is connected to the radio frequency signal, the second input terminal of the signal combining module is electrically connected to the output terminal of the voltage output module, and the output terminal of the signal combining module serves as the output terminal of the radio station.

[0028] Optionally, the voltage output module includes: a first transistor, a second transistor, a third transistor, a first resistor, a second resistor, a third resistor, a fourth resistor, a voltage regulator and a fourth diode;

[0029] The first electrode of the first transistor is connected to the negative voltage, the second electrode of the first transistor serves as the output end of the voltage output module, the control electrode of the first transistor is electrically connected to the anode of the voltage regulator tube; the cathode of the voltage regulator tube is connected to the output control signal; the first resistor is connected between the first electrode and the control electrode of the first transistor; the first end of the second resistor is connected to the output control signal, and the second end of the second resistor is electrically connected to the control electrode of the second transistor; the first electrode of the second transistor is grounded, and the second electrode of the second transistor is electrically connected to the cathode of the fourth diode, the control electrode of the third transistor and the first electrode of the third resistor respectively; the second end of the third resistor is connected to the positive voltage; the first end of the fourth resistor is electrically connected to the second end of the third resistor, and the second end of the fourth resistor is electrically connected to the second electrode of the third transistor; the first electrode of the third transistor is electrically connected to the anode of the fourth diode and the second electrode of the first transistor respectively.

[0030] The reconfigurable ultra-wideband dipole antenna provided in the embodiment of the present invention controls the working mode of the antenna through the first switching matcher and the second switching matcher, and constructs dipole antennas of different frequency bands by controlling whether the first radiation segment, the second radiation segment and the third radiation segment are working and controlling the connection mode between different radiation segments, thereby effectively expanding the working frequency bandwidth of the antenna. In addition, the same radiation segment can be applied in different modes, that is, at least part of the radiation segment is reused in different modes, and the antenna size is effectively reduced on the basis of ensuring that the antenna radiator in each frequency band mode has sufficient effective length, so that the antenna is easy to carry; and the length of the antenna radiator in each frequency band is sufficient, so its radiation area is sufficient, which can ensure that the antenna has sufficient gain. In addition, each mode is constructed as a dipole antenna, so that the antenna still has good radiation stability in a complex use environment. Therefore, compared with the prior art, the embodiment of the present invention can construct a dipole antenna in different frequency band working modes through the coordinated control of the first switching matcher and the second switching matcher, and on the basis of ensuring the working frequency bandwidth of the antenna, the gain and reliability of the antenna are guaranteed, and the volume of the antenna is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a structural schematic diagram of a reconfigurable ultra-wideband dipole antenna provided by an embodiment of the present invention;

[0032] Figure 2 is a schematic diagram of an antenna structure in a high-frequency band dipole antenna mode provided by an embodiment of the present invention;

[0033] Figure 3 is a schematic diagram of an antenna structure in a low-frequency dipole antenna mode provided by an embodiment of the present invention;

[0034] Figure 4 is a schematic diagram of an antenna structure in another high-frequency dipole antenna mode provided by an embodiment of the present invention;

[0035] Figure 5 is a schematic diagram of an antenna structure in another low-frequency dipole antenna mode provided by an embodiment of the present invention;

[0036] Figure 6 is a structural schematic diagram of another reconfigurable ultra-wideband dipole antenna provided by an embodiment of the present invention;

[0037] Figure 7 It is a structural schematic diagram of a radio station provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0038] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0039] An embodiment of the present invention provides a reconfigurable ultra-wideband dipole antenna. Figure 1 is a schematic diagram of the structure of a reconfigurable ultra-wideband dipole antenna provided by an embodiment of the present invention. Figure 1 The reconfigurable ultra-wideband dipole antenna includes: a first radiation section 10, a second radiation section 20, a third radiation section 30, a first switching matcher 40 and a second switching matcher 50.

[0040] The first radiation section 10, the second radiation section 20 and the third radiation section 30 are arranged in sequence; the first switching matcher 40 is located between the first radiation section 10 and the second radiation section 20; the second switching matcher 50 is located between the second radiation section 20 and the third radiation section 30. In addition, the first switching matcher 40 is electrically connected to the first radiation section 10 and the second radiation section 20, respectively, for controlling the working mode of the first radiation section 10 and the second radiation section 20; the second switching matcher 50 is electrically connected to the second radiation section 20 and the third radiation section 30, respectively, for controlling the working mode of the second radiation section 20 and the third radiation section 30; wherein the working mode includes a high-frequency dipole antenna mode formed by the first radiation section 10 and the second radiation section 20, and a low-frequency dipole antenna mode formed by the first radiation section 10, the second radiation section 20 and the third radiation section 30.

[0041] Exemplarily, the first radiation section 10, the second radiation section 20 and the third radiation section 30 can all be composed of radiation copper tubes, so that the reconfigurable ultra-wideband dipole antenna is an omnidirectional antenna. The first switching matcher 40 may include a PCB board and functional elements thereon, each functional element may be connected to form a switch control circuit and an antenna matching circuit, so that the first switching matcher 40 has a switch switching function and an impedance matching function; similarly, the second switching matcher 50 may also include a PCB board and functional elements thereon, each functional element may be connected to form a switch control circuit and an antenna matching circuit. Figure 1 As shown, illustratively, the first radiation section 10, the first switching matcher 40, the second radiation section 20, the second switching matcher 50 and the third radiation section 30 are sequentially arranged from bottom to top in a long strip shape.

[0042] Exemplarily, the working process of the reconfigurable ultra-wideband dipole antenna includes:

[0043] In the high-frequency band dipole antenna mode, the working frequency band of the antenna can be the L (Long Wave) band and / or the S (Short Wave) band. In this mode, the first switching matcher 40 controls the first radiating section 10 and the second radiating section 20 to be connected through the antenna matching circuit in the first switching matcher 40, and the second switching matcher 50 controls the second radiating section 20 to be disconnected from the third radiating section 30. In this way, the first radiating section 10 constitutes the first antenna radiator in the high-frequency band, and the second radiating section 20 constitutes the second antenna radiator in the high-frequency band. The first switching matcher 40 performs impedance matching of the high-frequency band dipole antenna, for example, 50Ω matching. Exemplarily, one end of the antenna matching circuit in the first switching matcher 40 is electrically connected to the part of the first radiating section 10 close to the first switching matcher 40, and the other end is electrically connected to the part of the second radiating section 20 close to the first switching matcher 40; that is, the feeding ends of the first antenna radiator in the high-frequency band and the second antenna radiator in the high-frequency band are both located close to the first switching matcher 40.

[0044] Low-frequency dipole antenna mode, the working frequency band of the antenna can be the VHF (Very High Frequency) band and / or the UHF (Ultra High Frequency) band. In this mode, the first switching matcher 40 controls the first radiating section 10 and the second radiating section 20 to be directly connected, and they serve together as the first low-frequency antenna radiator; the second switching matcher 50 controls the second radiating section 20 and the third radiating section 30 to be connected through the antenna matching circuit in the second switching matcher 50, and the third radiating section 30 serves as the second low-frequency antenna radiator; the second switching matcher 50 performs impedance matching of the low-frequency dipole antenna, such as 50Ω matching. Exemplarily, one end of the antenna matching circuit in the second switching matcher 50 is electrically connected to the part of the second radiating section 20 close to the second switching matcher 50, and the other end is electrically connected to the part of the third radiating section 30 close to the second switching matcher 50; that is, the feeding ends of the first low-frequency antenna radiator and the second low-frequency antenna radiator are both located close to the second switching matcher 50.

[0045] The reconfigurable ultra-wideband dipole antenna provided in the embodiment of the present invention controls the working mode of the antenna through the first switching matcher 40 and the second switching matcher 50, and constructs dipole antennas of different frequency bands by controlling whether the first radiation section 10, the second radiation section 20 and the third radiation section 30 are working and controlling the connection mode between different radiation sections, thereby effectively expanding the working frequency bandwidth of the antenna. In addition, the same radiation section can be applied in different modes, that is, at least part of the radiation section is reused in different modes, and the antenna size is effectively reduced on the basis of ensuring that the antenna radiator in each frequency band mode has sufficient effective length, so that the antenna is easy to carry; and if the length of the antenna radiator in each frequency band is sufficient, then its radiation area is sufficient, which can ensure that the antenna has sufficient gain. In addition, each mode is constructed as a dipole antenna, so that the antenna still has good radiation stability in a complex use environment. Therefore, compared with the prior art, the embodiment of the present invention can construct a dipole antenna in different frequency band working modes through the coordinated control of the first switching matcher 40 and the second switching matcher 50, and on the basis of ensuring the working frequency bandwidth of the antenna, the gain and reliability of the antenna are ensured, and the volume of the antenna is reduced.

[0046] Continue to see Figure 1 On the basis of the above embodiments, optionally, each component of the reconfigurable ultra-wideband dipole antenna is arranged in an antenna housing 61. The antenna housing 61 may be a glass fiber reinforced plastic tube. An antenna cap 62 may be arranged on the top of the antenna housing 61. This arrangement can provide good protection and support for the reconfigurable ultra-wideband dipole antenna.

[0047] Continue to see Figure 1On the basis of the above embodiments, optionally, the reconfigurable ultra-wideband dipole antenna is electrically connected to the radio station through a connector 70 (e.g., an RF coaxial connector) to achieve interaction of RF signals and control signals between the antenna and the radio station. A first coaxial line 64 may be provided between the connector 70 and the first switching matcher 40 to provide a signal transmission path between the radio station and the first switching matcher 40; a second coaxial line 65 may be provided between the first switching matcher 40 and the second switching matcher 50 to provide a signal transmission path between the first switching matcher 40 and the second switching matcher 40.

[0048] Continue to see Figure 1 On the basis of the above embodiments, optionally, an antenna choke device 63 may be provided at the bottom of the first radiation section 10, which may be formed by a coaxial cable wound around a choke frame in a spring shape. The provision of the antenna choke device 63 is conducive to improving the gain of the antenna.

[0049] The above embodiments exemplarily provide possible physical structures of the reconfigurable ultra-wideband dipole antenna. The connection relationship and implementation method between different radiation segments in different modes are described below in a modular form, but this is not intended to limit the present invention.

[0050] Figure 2 and Figure 3 The connection relationship of an antenna structure in different working modes is given. Figure 2 and Figure 3 In one embodiment, optionally, the first switching matcher 40 includes: a first matching module 410, a first switch module 420, and a second switch module 430. The first end of the first switch module 420 is electrically connected to the first radiation section 10, the second end of the first switch module 420 is electrically connected to the first end of the first matching module 410, and the third end of the first switch module 420 is electrically connected to the second radiation section 20. The first end of the second switch module 430 is electrically connected to the second end of the first matching module 410, and the second end of the second switch module 430 is electrically connected to the second radiation section 20. The first matching module 410 can be an impedance matching module of a high-frequency band dipole antenna.

[0051] The second switching matcher 50 includes: a second matching module 510 and a fifth switch module 520. The first end of the fifth switch module 520 is electrically connected to the second radiation segment 20, the second end of the fifth switch module 520 is electrically connected to the first end of the second matching module 510, and the second end of the second matching module 510 is electrically connected to the third radiation segment 30. The second matching module 510 can be an impedance matching module of a low-frequency dipole antenna.

[0052] In summary, the construction of dipole antennas in different frequency bands can be realized by controlling the states of the switch modules in the first switching matcher 40 and the second switching matcher 50. The connection relationship and implementation method of different antenna components in different modes are described in detail below.

[0053] Continue to see Figure 2 , control the first end and the second end of the first switch module 420 to be connected, and the first end and the third end to be disconnected; control the first end and the second end of the second switch module 430 to be connected; and control the first end and the second end of the fifth switch module 520 to be disconnected. In this way, the first radiation section 10 and the second radiation section 20 are connected through the first matching module 410 to form a high-frequency dipole antenna; the second matching module 510 and the third radiation section 30 do not work; and a high-frequency dipole antenna mode can be realized.

[0054] Continue to see Figure 3 , control the first end and the second end of the first switch module 420 to be disconnected, and the first end and the third end to be connected; control the first end and the second end of the second switch module 430 to be disconnected; and control the first end and the second end of the fifth switch module 520 to be connected. In this way, the first radiation section 10 is directly connected to the second radiation section 20 to form a low-frequency first antenna radiator; the low-frequency first antenna radiator and the third radiation section 30 are connected through the second matching module 510 to form a low-frequency dipole antenna; the first matching module 410 does not work; and a low-frequency dipole antenna mode can be achieved.

[0055] Figure 4 and Figure 5 The connection relationship of another antenna structure in different working modes is given. Figure 4 and Figure 5 In another embodiment, optionally, the structure of the second switching matcher 50 is Figure 2 and Figure 3 The first switching matcher 40 may have other structures, specifically including: a first matching module 410 and a third switch module 460. The first end of the first matching module 410 is electrically connected to the first radiation section 10; the first end of the third switch module 460 is electrically connected to the second radiation section 20, the second end of the third switch module 460 is electrically connected to the second end of the first matching module 410, and the third end of the third switch module 460 is electrically connected to the first radiation section 10.

[0056] This embodiment is equivalent to Figure 2 The two switch modules of the first switch matcher 40 are integrated into one switch module, which simplifies the structure of the first switch matcher 40 while ensuring the switching function. The connection relationship and implementation method of different components of the antenna in different modes are specifically described below.

[0057] Continue to see Figure 4 , control the first end and the second end of the third switch module 460 to be connected, and the first end and the third end to be disconnected; and control the first end and the second end of the fifth switch module 520 to be disconnected. In this way, the first radiation section 10 and the second radiation section 20 are connected through the first matching module 410 to form a high-frequency dipole antenna, and realize a high-frequency dipole antenna mode.

[0058] Continue to see Figure 5 , control the first end and the second end of the third switch module 460 to be disconnected, and the first end and the third end to be connected; and control the first end and the second end of the fifth switch module 520 to be connected. In this way, the first radiating section 10 is directly connected to the second radiating section 20 to form a low-frequency first antenna radiator; the low-frequency first antenna radiator and the third radiating section 30 are connected through the second matching module 510 to form a low-frequency dipole antenna, realizing a low-frequency dipole antenna mode.

[0059] On the basis of the above embodiments, optionally, the control signal of each switch module is provided by the radio station, and the radio station and the antenna realize the interaction of the radio frequency signal and the control signal through the connector. The input end of the first switching matcher 40 is electrically connected to the output end of the radio station, and the first switching matcher 40 is electrically connected to the second switching matcher 50. Taking the antenna signal transmission process as an example, illustratively, the output signal of the radio station is a mixed signal of the radio frequency signal and the DC voltage signal. After receiving the output signal of the radio station, the first switching matcher 40 first separates and processes the signal, and then distributes the separated signal to each radiation segment and the second switching matcher 50 for transmission. Among them, the radio frequency signal is used as the signal that the antenna needs to radiate, and the DC voltage signal is used as the control signal of each switch module. In this way, there is no need to set a power supply module or a control signal generating module separately in the two switching matchers, which can effectively simplify the antenna structure. In order to achieve the above functions, the first switching matcher can be set to include: a signal separation module and a fourth switch module. The signal separation module is used to separate and process the output signal of the radio station to obtain a radio frequency signal and a DC voltage signal; the fourth switch module is used to control the transmission of the radio frequency signal to the first matching module 410 or the second matching module 510.

[0060] by Figure 4 and Figure 5Taking the structure in as an example, in one embodiment, optionally, the signal separation module 440 includes an input end, a first output end, and a second output end; the input end of the signal separation module 440 is electrically connected to the output end of the radio station; the first output end of the signal separation module 440 is used to output a radio frequency signal, and the second output end is used to output a DC voltage signal. The control end of the fourth switch module 450 is electrically connected to the second output end of the signal separation module 440, the first end of the fourth switch module 450 is electrically connected to the first output end of the signal separation module 440, the second end of the fourth switch module 450 is electrically connected to the third end of the first matching module 410, and the third end of the fourth switch module 450 is electrically connected to the second switching matcher 50 (specifically, electrically connected to the third end of the second matching module 510). The DC voltage signal output by the signal separation module 440 is transmitted to the control ends of all switch modules in the first switching matcher 40 and the second switching matcher 50.

[0061] See also Figure 4 , the DC voltage signal output by the radio station 200 is a positive voltage VCC+, which controls the antenna to work in the high-frequency dipole antenna mode. Specifically, under the control of the positive voltage VCC+, the first end and the second end of the third switch module 460 are connected, the first end and the second end of the fourth switch module 450 are connected, and the first end and the second end of the fifth switch module 520 are disconnected. The RF signal is transmitted to the first radiation section 10 and the second radiation section 20 respectively through the fourth switch module 450 and the first matching module 410. At this time, the RF signal output by the radio station 200 can be in the L band or the S band.

[0062] See also Figure 5 , the DC voltage signal output by the radio station 200 is a negative voltage VCC-, which controls the antenna to work in the low-frequency dipole antenna mode. Specifically, under the control of the negative voltage VCC-, the first end and the third end of the third switch module 460 are connected, the first end and the third end of the fourth switch module 450 are connected, and the first end and the second end of the fifth switch module 520 are connected. The RF signal is transmitted to the third radiation segment 30 and the connector between the first radiation segment 10 and the second radiation segment 20 respectively through the fourth switch module 450 and the second matching module 510. At this time, the RF signal output by the radio station 200 can be in the VHF band or the UHF band.

[0063] For example, see Figure 1, the first coaxial line 64 and the second coaxial line 65 can have the same structure, both of which are composed of two layers of conductive material and a layer of insulating material; that is, the coaxial line is formed by wrapping a layer of insulating material outside the conductive inner core, and then wrapping a layer of conductive outer skin outside the insulating material. The conductive inner cores of the first coaxial line 64 and the second coaxial line 65 are used to realize signal transmission between the radio station and the first switching matcher 40, and between the first switching matcher 40 and the second switching matcher 50. The conductive outer skins of the first coaxial line 64 and the second coaxial line 65 are used to realize signal transmission between the first switching matcher 40 and the second switching matcher 50 and the first radiation section 10 and the second radiation section 20. Specifically, it can be embodied as follows: the conductive outer skin of the first coaxial line 64 is electrically connected to the first radiation section 10, for example, it is electrically connected to the first radiation section 10 through connection points at the upper and lower ends of the first radiation section 10; the conductive outer skin of the second coaxial line 65 is electrically connected to the second radiation section 20, for example, it is electrically connected to the second radiation section 20 through connection points at the upper and lower ends of the second radiation section 10. The radio station is electrically connected to the signal separation module 440 through the conductive inner core of the first coaxial line 64; the fourth switch module 450 is electrically connected to the second matching module 510 through the conductive inner core of the second coaxial line 65 to achieve transmission of radio frequency signals when necessary. The bottom of the conductive outer skin of the first coaxial line 64 is grounded; the first matching module 410 and the third switch module 460 are both electrically connected to the top of the conductive outer skin of the first coaxial line 64; the third switch module 460 is electrically connected to the bottom of the conductive outer skin of the second coaxial line 65; and the fifth switch module 520 is electrically connected to the top of the conductive outer skin of the second coaxial line 65.

[0064] In summary, the embodiment of the present invention realizes the reconfiguration of the antenna through switch control, which greatly improves the antenna operating frequency range. It should be noted that: Figure 2-5 In order to give a clear illustration, each switch module is drawn as a switch with connection points, but it does not limit the specific form of the switch module. Each switch module itself can be a single-end or double-end controllable switch, or a circuit composed of unidirectional conductive devices such as diodes.

[0065] The above embodiments exemplarily provide the module structure of two switch matchers. Figure 6 , the specific implementation circuits that the two switching matchers may have are described.

[0066] Figure 6 is a schematic diagram of the structure of another reconfigurable ultra-wideband dipole antenna provided by an embodiment of the present invention, which can correspond to Figure 4 and Figure 5 See Figure 6In one embodiment, the signal separation module 440 optionally includes: capacitors C1 and C2, and an inductor L3, which are used to separate the output signal Sdt of the radio station into a radio frequency signal and a DC voltage signal VCC. The capacitor C1 is a DC blocking capacitor, which can pass the radio frequency signal and block the DC voltage signal VCC. The inductor L3 is an inductor with a certain inductance value, and forms a low-pass filter with the capacitor C2, whose passband frequency is much smaller than the low-frequency signal in the radio frequency signal, so the radio frequency signal is strangled, and only the DC voltage signal VCC is output.

[0067] Continue to see Figure 6 In one embodiment, optionally, the fourth switch module 450 includes: a first inductor L1, a first diode D1 and a second diode D2; the first end of the first inductor L1 is connected to the DC voltage signal VCC, and the second end of the first inductor L1 is electrically connected to the first output end of the signal separation module 440, the cathode of the first diode D1 and the anode of the second diode D2 respectively; the anode of the first diode D1 is electrically connected to the second switching matcher 50; the cathode of the second diode D2 is electrically connected to the third end of the first matching module 410.

[0068] Continue to see Figure 6 In one embodiment, optionally, the third switch module 460 includes: an inductor L6, diodes D5 and D6. The first end of the inductor L6 is connected to the DC voltage signal VCC, and the second end of the inductor L6 is electrically connected to the anode of the diode D5 and the cathode of the diode D6 respectively; the cathode of the diode D5 is electrically connected to the second end of the first matching module 410; and the anode of the diode D6 is electrically connected to the first radiation section 10.

[0069] Continue to see Figure 6 In one embodiment, optionally, the first matching module 410 includes: inductors L4 and L5, capacitors C3, C4 and C5. The first end of the inductor L4 is electrically connected to the first end of the capacitor C3 and serves as the third end of the first matching module 410; the second end of the inductor L4 is electrically connected to the first end of the inductor L5 and the first end of the capacitor C4 respectively; the second end of the inductor L5 is electrically connected to the first end of the capacitor C5 and serves as the second end of the first matching module 410; the second end of the capacitor C3 serves as the first end of the first matching module 410 and is connected to the first radiation section 10; the second end of the capacitor C4 and the second end of the capacitor C5 are both electrically connected to the second end of the capacitor C3. Exemplarily, the first switching matcher 40 also includes an inductor L7, the first end of the inductor L7 is electrically connected to the second end of the inductor L5, and the second end of the inductor L7 is grounded.

[0070] Continue to see Figure 6In one embodiment, optionally, the second matching module 510 includes: inductors L8, L9 and L10, and capacitors C6, C7, C8 and C9. The first end of the inductor L8 is electrically connected to the first end of the capacitor C6 and serves as the third end of the second matching module 510; the second end of the inductor L8 is electrically connected to the first end of the inductor L9 and the first end of the capacitor C7 respectively; the second end of the inductor L9 is electrically connected to the first end of the inductor L10 and the first end of the capacitor C8 respectively; the second end of the inductor L10 is electrically connected to the first end of the capacitor C9 and serves as the second end of the second matching module 510; the second end of the capacitor C9 serves as the first end of the second matching module 510 and is electrically connected to the second end of the fifth switch module 520; the second end of the capacitor C6, the second end of the capacitor C7 and the second end of the capacitor C8 are all electrically connected to the second end of the capacitor C9. Exemplarily, the second switching matcher 50 also includes an inductor L11, the first end of the inductor L11 is electrically connected to the first end of the inductor L8, and the second end of the inductor L11 is grounded.

[0071] Continue to see Figure 6 In one embodiment, optionally, the fifth switch module 520 includes: a second inductor L2 and a third diode D3; the first end of the second inductor L2 is connected to the DC voltage signal VCC, and the second end of the second inductor L2 is electrically connected to the cathode of the third diode D3 and the first end of the second matching module 510 respectively; the anode of the third diode D3 is electrically connected to the second radiation segment 20. Exemplarily, the second switch matcher 50 also includes a capacitor C10 and an inductor L12, which are used to block the transmission of the DC voltage signal VCC to the second radiation segment 20 to improve the antenna gain; the capacitor C10 is connected between the third diode D3 and the second radiation segment 20, and one end of the inductor L12 is electrically connected to the anode of the third diode D3, and the other end is grounded.

[0072] Exemplarily, the working process of the reconfigurable ultra-wideband dipole antenna includes:

[0073] When the DC voltage signal VCC is a positive voltage, the diodes D1, D6 and D3 are turned off, and the diodes D2 and D5 are turned on; the first matching module 410 serves as a high-frequency matching circuit, and together with the first radiation section 10 and the second radiation section 20 forms a high-frequency dipole antenna.

[0074] When the DC voltage signal VCC is a negative high voltage, diodes D1, D6 and D3 are turned on, diodes D2 and D5 are turned off, and the first radiation section 10 is connected to the second radiation section 20 to form a low-frequency band first antenna radiator; the second matching module 510 serves as a low-frequency band matching circuit, and together with the low-frequency band first antenna radiator and the third radiation section 30, forms a low-frequency band dipole antenna.

[0075] In summary, this embodiment designs a circuit structure in which the antenna and the radio station cooperate, which facilitates the radio station to control the working frequency of the antenna, realizes the reconfiguration of the antenna in the circuit, and greatly broadens the antenna bandwidth.

[0076] On the basis of the above embodiments, optionally, all diodes in the circuit can adopt PIN diodes, preferably wide-band and low-loss PIN diodes, whose on-resistance is at the milliohm level and off-resistance is above the megohm level. The loss caused in the on-state can be ignored, and the off-state can be regarded as an open circuit state. Therefore, compared with antennas of the same size, this design can improve the antenna gain while ensuring the antenna operating frequency.

[0077] The embodiment of the present invention also provides a communication system, including a radio station and a reconfigurable ultra-wideband dipole antenna as provided in any embodiment of the present invention, which has corresponding beneficial effects. The radio station and the reconfigurable ultra-wideband dipole antenna can be connected via a connector.

[0078] Figure 7 is a schematic diagram of the structure of a radio station provided by an embodiment of the present invention. Figure 7 In one implementation, optionally, the radio station 200 includes: a voltage output module 90 and a signal combining module 80 .

[0079] The control end of the voltage output module 90 is connected to the output control signal D0, the first input end of the voltage output module 90 is connected to the negative voltage VCC-, and the second input end of the voltage output module 90 is connected to the positive voltage VCC+. The first input end of the signal combiner module 80 is connected to the radio frequency signal SRF, the second input end of the signal combiner module 80 is electrically connected to the output end of the voltage output module 90, and the output end of the signal combiner module 80 serves as the output end of the radio station 200.

[0080] Continue to see Figure 7 In one embodiment, optionally, the signal combining module 80 includes: capacitors C11 and C12, and an inductor L13. Among them, the capacitor C11 is a DC blocking capacitor, which can pass the radio frequency signal SRF and block the DC voltage signal to prevent the DC current from flowing into the radio frequency signal generating module inside the radio station 200 and affecting the normal operation of the radio frequency path. The inductor L13 is an inductor with a certain inductance value, and forms a low-pass filter with the capacitor C12, and its passband frequency is much smaller than the low-frequency signal of the radio frequency signal SRF, so the radio frequency signal RSF is strangled and will not be transmitted to the voltage output module 90. Therefore, the DC voltage signal and the radio frequency signal SRF are both transmitted unidirectionally to the output end of the radio station 200 to form the output signal Sdt.

[0081] Continue to see Figure 7In one implementation, optionally, the voltage output module 90 includes: a first transistor Q1, a second transistor Q2, a third transistor Q3, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a voltage regulator DZ and a fourth diode D4. The first electrode of the first transistor Q1 is connected to the negative voltage VCC-, the second electrode of the first transistor Q1 serves as the output end of the voltage output module 90, and the control electrode of the first transistor Q1 is electrically connected to the anode of the voltage regulator DZ; the cathode of the voltage regulator DZ is connected to the output control signal D0; the first resistor R1 is connected between the first electrode and the control electrode of the first transistor Q1; the first end of the second resistor R2 is connected to the output control signal D0, and the second end of the second resistor R2 is electrically connected to the control electrode of the second transistor Q2; the first electrode of the second transistor Q2 is grounded, and the second electrode of the second transistor Q2 is electrically connected to the cathode of the fourth diode D4, the control electrode of the third transistor Q3 and the first electrode of the third resistor R3 respectively; the second end of the third resistor R3 is connected to the positive voltage VCC+; the first end of the fourth resistor R4 is electrically connected to the second end of the third resistor R3, and the second end of the fourth resistor R4 is electrically connected to the second electrode of the third transistor Q3; the first electrode of the third transistor Q3 is electrically connected to the anode of the fourth diode D4 and the second electrode of the first transistor Q1 respectively.

[0082] Exemplarily, in the voltage output module 90, the three transistors can all be N-channel MOS tubes, the gate of the MOS tube serves as the control electrode of the transistor, the source serves as the first electrode of the transistor, and the drain serves as the second electrode of the transistor. The voltage regulator Dz is a Zener diode, and its voltage regulation value is a high voltage value. The first transistor Q1, the first resistor R1 and the voltage regulator DZ perform on-off control of the negative voltage VCC-; the second transistor Q2, the third transistor Q3, the fourth diode D4, the second resistor R2, the third resistor R3 and the fourth resistor R4 perform on-off control of the positive voltage VCC+. The output signal of the voltage output module 90 can be transmitted to the combining module 80 through the resistor R5. The negative voltage VCC- can be a ground signal. The working principle of the voltage output module 90 is as follows:

[0083] When the output control signal D0 is at a high level, the voltage regulator DZ reversely breaks down, and its anode potential rises, causing the gate-source voltage difference of the first transistor Q1 to be greater than its on-voltage, the first transistor Q1 is turned on, and the negative voltage VCC- is output. At the same time, the gate-source voltage difference of the second transistor Q2 is greater than its on-voltage, the second transistor Q2 is turned on, and the ground signal is transmitted to the gate of the third transistor Q3 through the second transistor Q2, controlling the third transistor Q3 to be disconnected, and the positive voltage VCC+ is cut off. At this time, the voltage output module 90 outputs a negative voltage VCC-.

[0084] When the output control signal D0 is at a low level, the anode potential of the voltage regulator DZ is basically kept at a low potential, the gate-source voltage difference of the first transistor Q1 is approximately zero, the first transistor Q1 is disconnected, and the negative voltage VCC- is cut off. At the same time, the low level of the output control signal D0 is transmitted to the gate of the second transistor Q2, controlling the second transistor Q2 to be disconnected; the positive voltage VCC+ is transmitted to the gate of the third transistor Q3, controlling the third transistor Q3 to be turned on, so that the positive voltage VCC+ is output. At this time, the voltage output module 90 outputs the positive voltage VCC+.

[0085] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A reconfigurable ultra-wideband dipole antenna, characterized in that: include: A first radiation section, a second radiation section and a third radiation section are arranged in sequence; A first switching matcher is located between the first radiation section and the second radiation section; and the first switching matcher is electrically connected to the first radiation section and the second radiation section respectively, and is used to control the working mode of the first radiation section and the second radiation section; a second switching matcher, located between the second radiation segment and the third radiation segment; and the second switching matcher is electrically connected to the second radiation segment and the third radiation segment, respectively, and is used to control the working modes of the second radiation segment and the third radiation segment; wherein the working modes include a high-frequency dipole antenna mode formed by the first radiation segment and the second radiation segment, and a low-frequency dipole antenna mode formed by the first radiation segment, the second radiation segment and the third radiation segment; The high-frequency band dipole antenna mode, the working frequency band of the antenna is the L band and / or the S band, in this mode, the first switching matcher controls the first radiating section and the second radiating section to be connected through the antenna matching circuit in the first switching matcher, the second switching matcher controls the second radiating section to be disconnected from the third radiating section, the first radiating section constitutes a high-frequency band first antenna radiator, the second radiating section constitutes a high-frequency band second antenna radiator, the first switching matcher performs impedance matching of the high-frequency band dipole antenna, one end of the antenna matching circuit in the first switching matcher is electrically connected to a portion of the first radiating section close to the first switching matcher, and the other end is electrically connected to a portion of the second radiating section close to the first switching matcher; The low-frequency dipole antenna mode, the working frequency band of the antenna is the VHF band and / or the UHF band. In this mode, the first switching matcher controls the first radiating section and the second radiating section to be directly connected, and they jointly serve as the first low-frequency antenna radiator; the second switching matcher controls the second radiating section and the third radiating section to be connected through the antenna matching circuit in the second switching matcher, and the third radiating section serves as the second low-frequency antenna radiator; The second switching matcher performs impedance matching of the low-frequency dipole antenna, and one end of the antenna matching circuit in the second switching matcher is electrically connected to a portion of the second radiation segment close to the second switching matcher, and the other end is electrically connected to a portion of the third radiation segment close to the second switching matcher.

2. The reconfigurable ultra-wideband dipole antenna according to claim 1, characterized in that: The first switching matcher comprises: A first matching module; A first switch module; a first end of the first switch module is electrically connected to the first radiation segment, a second end of the first switch module is electrically connected to the first end of the first matching module, and a third end of the first switch module is electrically connected to the second radiation segment; A second switch module; a first end of the second switch module is electrically connected to a second end of the first matching module, and a second end of the second switch module is electrically connected to the second radiation segment.

3. The reconfigurable ultra-wideband dipole antenna according to claim 1, characterized in that: The first switching matcher comprises: A first matching module; a first end of the first matching module is electrically connected to the first radiation segment; a third switch module; a first end of the third switch module is electrically connected to the second radiation segment, a second end of the third switch module is electrically connected to the second end of the first matching module, and a third end of the third switch module is electrically connected to the first radiation segment.

4. The reconfigurable ultra-wideband dipole antenna according to claim 2 or 3, characterized in that: The input end of the first switching matcher is electrically connected to the output end of the radio station; wherein the output signal of the output end of the radio station includes: a radio frequency signal and a DC voltage signal; The first switching matcher also includes: A signal separation module, comprising an input end, a first output end, and a second output end; the input end of the signal separation module is electrically connected to the output end of the radio station; the first output end of the signal separation module outputs the radio frequency signal, and the second output end of the signal separation module outputs the DC voltage signal; The fourth switch module includes a control end, a first end, a second end and a third end; the control end of the fourth switch module is electrically connected to the second output end of the signal separation module, the first end of the fourth switch module is electrically connected to the first output end of the signal separation module, the second end of the fourth switch module is electrically connected to the third end of the first matching module, and the third end of the fourth switch module is electrically connected to the second switching matcher.

5. The reconfigurable ultra-wideband dipole antenna according to claim 4, characterized in that: The fourth switch module includes: a first inductor, a first diode and a second diode; the first end of the first inductor is connected to the DC voltage signal, and the second end of the first inductor is electrically connected to the first output end of the signal separation module, the cathode of the first diode and the anode of the second diode respectively; the anode of the first diode is electrically connected to the second switching matcher; the cathode of the second diode is electrically connected to the third end of the first matching module.

6. The reconfigurable ultra-wideband dipole antenna according to claim 4, characterized in that: The second switching matcher comprises: A fifth switch module; a control end of the fifth switch module is connected to the DC voltage signal, and a first end of the fifth switch module is electrically connected to the second radiation segment; a second matching module; a first end of the second matching module is electrically connected to the second end of the fifth switch module, a second end of the second matching module is electrically connected to the third radiation segment, and a third end of the second matching module is electrically connected to the third end of the fourth switch module.

7. The reconfigurable ultra-wideband dipole antenna according to claim 6, characterized in that: The fifth switch module includes: a second inductor and a third diode; the first end of the second inductor is connected to the DC voltage signal, and the second end of the second inductor is electrically connected to the cathode of the third diode and the first end of the second matching module respectively; the anode of the third diode is electrically connected to the second radiation segment.

8. A communication system, characterized in that: include: A radio station and a reconfigurable ultra-wideband dipole antenna as claimed in any one of claims 1 to 7.

9. The communication system according to claim 8, characterized in that: The stations include: A voltage output module comprises a control terminal, a first input terminal, a second input terminal and an output terminal; the control terminal of the voltage output module is connected to an output control signal, the first input terminal of the voltage output module is connected to a negative voltage, and the second input terminal of the voltage output module is connected to a positive voltage; The signal combining module comprises a first input terminal, a second input terminal and an output terminal; the first input terminal of the signal combining module is connected to the radio frequency signal, the second input terminal of the signal combining module is electrically connected to the output terminal of the voltage output module, and the output terminal of the signal combining module serves as the output terminal of the radio station.

10. The communication system according to claim 9, characterized in that: The voltage output module includes: a first transistor, a second transistor, a third transistor, a first resistor, a second resistor, a third resistor, a fourth resistor, a voltage regulator and a fourth diode; The first electrode of the first transistor is connected to the negative voltage, the second electrode of the first transistor serves as the output end of the voltage output module, the control electrode of the first transistor is electrically connected to the anode of the voltage regulator tube; the cathode of the voltage regulator tube is connected to the output control signal; the first resistor is connected between the first electrode and the control electrode of the first transistor; the first end of the second resistor is connected to the output control signal, and the second end of the second resistor is electrically connected to the control electrode of the second transistor; the first electrode of the second transistor is grounded, and the second electrode of the second transistor is electrically connected to the cathode of the fourth diode, the control electrode of the third transistor and the first electrode of the third resistor respectively; the second end of the third resistor is connected to the positive voltage; the first end of the fourth resistor is electrically connected to the second end of the third resistor, and the second end of the fourth resistor is electrically connected to the second electrode of the third transistor; the first electrode of the third transistor is electrically connected to the anode of the fourth diode and the second electrode of the first transistor respectively.

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