A communication device with satellite communication and PDT trunking intercom common antenna structure

Abstract

The application provides a communication device with a satellite communication and PDT cluster intercom shared antenna structure, comprising a device main body and a communication antenna, the device main body is internally provided with an intercom communication part, a satellite communication part and a coaxial radio frequency cable, the coaxial radio frequency cable comprises a cable inner core, an insulation layer, a metal anti-interference shielding layer and an insulation protective skin which are sequentially sleeved from inside to outside, one end of the cable inner core is electrically connected with the satellite communication part, the communication antenna is provided with an antenna ground and an antenna inner core, the other end of the cable inner core is electrically connected with the antenna inner core, the coaxial radio frequency cable is provided with a bare port, the intercom communication part can be electrically connected with the metal anti-interference shielding layer, and the metal anti-interference shielding layer is connected with the antenna ground. The beneficial effect is that: through a single communication antenna, the satellite communication and the intercom communication are compatible with the transmission and reception, the structural characteristics of the coaxial radio frequency cable are utilized, another communication signal transmission and reception is realized by cooperating with the antenna ground of the communication antenna, and the transmission loss of the communication signal caused by the transfer switch in the traditional scheme is reduced.

Description

Technical Field

[0001] This invention relates to the field of mobile communication equipment technology, and specifically to a communication device with a shared antenna structure for satellite communication and PDT trunking intercom. Background Technology

[0002] With the rapid development of modern communication technology, multi-mode fusion intercom devices have become indispensable core electronic communication equipment in outdoor scenarios such as emergency rescue, field operations, and law enforcement. These devices can ensure stable and reliable outdoor communication links in harsh environments such as complex terrain, lack of infrastructure, and extreme weather, providing crucial support for personnel safety and mission execution. As multi-mode fusion intercom technology continues to iterate and upgrade, the devices' functions are becoming increasingly rich and comprehensive. To meet the diverse communication needs of different scenarios, current mainstream multi-mode fusion terminals generally integrate satellite communication systems with PDT trunking / conventional intercom systems. Users can flexibly switch between different communication modes according to the actual usage scenario and signal coverage, achieving a seamless combination of wide-area coverage and short-range trunking communication.

[0003] However, existing multi-mode fusion terminals generally suffer from technical shortcomings in implementing the aforementioned two communication functions. Currently, the industry mainly employs two signal transmission schemes: First, designing two independent antennas, one for satellite communication and the other for PDT trunking intercom signal transmission and reception, along with two independent RF feeders connected to the corresponding communication modules. While this scheme can achieve basic communication functions, the two antennas and feeders occupy a significant amount of internal space, resulting in low device integration and significantly increasing structural design difficulty and manufacturing / assembly complexity within product size constraints. Second, using a single antenna with an RF switch to switch or couple two RF signals, sharing a single antenna for signal transmission. This scheme requires additional RF switches and other components, leading to risks of contact loss, signal switching delay, and switch failure, resulting in poor device reliability. It also increases hardware costs and signal transmission loss, making it difficult to meet the miniaturization and low signal loss requirements of multi-mode fusion terminals. Summary of the Invention

[0004] To address the problems in the prior art, this invention provides a communication device with a shared antenna structure for satellite communication and PDT trunking intercom. This solves the problems of complex structure and signal transmission loss in the existing multi-mode fusion intercom terminal, which integrates satellite communication and intercom communication.

[0005] This invention discloses a communication device with a shared antenna structure for satellite communication and PDT trunking intercom. The device includes a main body and a communication antenna. The main body houses an intercom communication component, a satellite communication component, and a coaxial radio frequency cable. The coaxial radio frequency cable includes an inner cable core, an insulating layer, a metal anti-interference shielding layer, and an insulating protective sheath, arranged from the inside out. One end of the inner cable core is electrically connected to the satellite communication component. The communication antenna has an antenna ground and an antenna core. The other end of the inner cable core is electrically connected to the antenna core. The satellite communication component can transmit and receive satellite communication through a mating fit between the inner cable core and the antenna core. The coaxial radio frequency cable has an exposed opening that mates with the metal anti-interference shielding layer. The intercom communication component can pass through this exposed opening and connect electrically to the metal anti-interference shielding layer. One end of the metal anti-interference shielding layer is connected to the antenna ground. The intercom communication component, in conjunction with the metal anti-interference shielding layer, can transmit and receive intercom communication through the antenna ground.

[0006] The present invention is further improved, wherein the communication antenna includes an antenna body and an antenna connecting nut seat that are threadedly connected to the antenna body. The device body is provided with an antenna mounting position that mates with the antenna connecting nut seat. The antenna connecting nut seat is located in the antenna mounting position. An electrical connection plate is provided at the end of the antenna connecting nut seat away from the antenna body. An electrical connection seat that mates with a coaxial radio frequency cable is provided on the electrical connection plate. The electrical connection seat includes a connection seat body and a connection seat inner core. A signal pin is provided inside the antenna body. One end of the connection seat inner core is connected to the signal pin. The signal pin and the connection seat inner core form the antenna inner core. The connection seat body and the antenna connecting nut seat are electrically connected. The antenna connecting nut seat and the connection seat body form the antenna ground.

[0007] The present invention is further improved in that the satellite communication component includes a satellite communication main board, a communication connector is provided on the satellite communication main board, a communication pin is provided in the communication connector, a first electrical connector and a second metal electrical connector are respectively provided at both ends of the coaxial radio frequency cable, the first electrical connector is provided with a first cable channel that mates with the inner core of the cable, the inner core of the cable is connected to the communication pin, the second metal electrical connector is also provided with a second cable channel that mates with the inner core of the cable, the second cable channel is provided with an isolation layer, the isolation layer is used to isolate the second metal electrical connector and the inner core of the cable to avoid short circuit, the second metal electrical connector is electrically connected to the metal anti-interference shielding layer, the second metal electrical connector is inserted into the electrical connector, the second metal electrical connector is in contact with the main body of the connector, and the inner core of the cable in the second cable channel is electrically connected to the inner core of the connector.

[0008] The present invention is further improved in that the intercom communication device includes an intercom communication motherboard, on which electrical connection solder joints are provided, and the electrical connection solder joints are connected to the metal anti-interference shielding layer by electric soldering.

[0009] The invention is further improved by arranging the intercom communication device and the satellite communication device side by side, with the intercom communication device located on the side closer to the communication antenna.

[0010] The invention is further improved by providing cable routing clearance spaces on the sides of the intercom and satellite communication components, and installing coaxial radio frequency cables in the cable routing clearance spaces.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention provides a communication device with a shared antenna structure for satellite communication and PDT trunking intercom. This structure effectively solves the problems of complex structure and signal transmission loss inherent in the existing multi-mode fusion intercom terminal design, which integrates satellite communication and intercom communication. Through the cooperation between the satellite communication component, cable core, and antenna core, and the cooperation between the intercom communication component, metal anti-interference shielding layer, and antenna ground, a single communication antenna can be used to transmit and receive both satellite and intercom communication types. Utilizing the structural characteristics of the coaxial RF cable, and in conjunction with the antenna ground of the communication antenna, another communication signal can be transmitted and received. Only a single coaxial RF cable is used to complete the transmission of both communication signals, simplifying the structure while enabling the transmission of two signals. This reduces the signal loss during transmission caused by the relay switch in traditional solutions, meeting the miniaturization design and low signal loss development requirements of multi-mode fusion terminals. Attached Figure Description

[0012] To more clearly illustrate the solutions in this invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the internal structure of the communication equipment, which features a shared antenna structure for satellite communication and PDT trunking intercom. Figure 2 This is a schematic diagram of a communication antenna structure; Figure 3 This is a schematic diagram of a coaxial radio frequency cable structure; Figure 4 Radiation pattern for PDT trunking / regular intercom performance test example 1; Figure 5 Radiation pattern for PDT trunking / regular intercom performance test example 2; Figure 6 Radiation pattern for PDT trunking / regular intercom performance test example 3; Figure 7 The radiation pattern is shown in Test Example 1 of the Tiantong satellite communication performance test. Figure 8 The radiation pattern is shown in Test Example 2 of the Tiantong satellite communication performance test. Figure 9 This is the radiation pattern of Test Example 3 for the Tiantong satellite communication performance test. Detailed Implementation

[0014] Unless otherwise defined, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings are used to distinguish different objects, not to describe a particular order.

[0015] In this invention, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment to other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this invention can be combined with other embodiments.

[0016] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0017] like Figure 1-3 As shown, this invention discloses a communication device with a shared antenna structure for satellite communication and PDT trunking intercom. The device includes a main body 1 and a communication antenna 2. The main body 1 houses an intercom communication component 3, a satellite communication component 4, and a coaxial radio frequency cable 5. The coaxial radio frequency cable 5 includes an inner cable core, an insulating layer, a metal anti-interference shielding layer 51, and an insulating protective sheath 52, arranged from the inside out. One end of the inner cable core is electrically connected to the satellite communication component 4. The communication antenna 2 has an antenna ground and an antenna core, and the other end of the inner cable core is electrically connected to the antenna core. The satellite communication device 4 can transmit and receive communications by mating the inner core of the cable with the inner core of the antenna. The coaxial radio frequency cable 5 is provided with an exposed port 50 that mates with the metal anti-interference shielding layer 51. The walkie-talkie communication device 3 can pass through the exposed port 50 and be electrically connected to the metal anti-interference shielding layer 51. One end of the metal anti-interference shielding layer 51 is connected to the antenna ground. The walkie-talkie communication device 3 can transmit and receive communications by mating with the metal anti-interference shielding layer 51 and mate with the antenna ground. The walkie-talkie communication device 3 and the satellite communication device 4 can respectively control the transmission and reception of different types of communications.

[0018] By coordinating the satellite communication component 4, the inner core of the cable, and the inner core of the antenna, and by coordinating the intercom communication component 3, the metal anti-interference shielding layer 51, and the antenna ground, a single communication antenna 2 can be used to transmit and receive both satellite communication and intercom communication. Utilizing the structural characteristics of the coaxial RF cable 5, and in conjunction with the antenna ground of the communication antenna 2, another communication signal can be transmitted and received. The transmission of both communication signals can be completed using only a single coaxial RF cable 5, simplifying the structure while enabling the transmission of two signals. This reduces the signal loss during transmission caused by the relay switch in traditional solutions, and meets the development needs of miniaturized design and low signal loss in multi-mode fusion terminals.

[0019] The intercom control component is used to enable the operation of PDT trunking / conventional intercom systems, while the satellite communication component is used to enable the operation of the Tiantong satellite system.

[0020] In this embodiment, the signal of the intercom control component is transmitted and received by radiating the intercom communication signal through the metal anti-interference shielding layer 51 to the antenna ground. The signal of the satellite communication component is transmitted and received by radiating the signal through the inner core of the cable to the inner core of the antenna.

[0021] Utilizing the structural characteristics of the coaxial radio frequency cable 5, the inner core of the cable serves as the radio frequency signal line for satellite phones, transmitting radio frequency signals from Tiantong satellite and ground orbit satellites. The metal anti-interference shielding layer 51 serves as the radio frequency signal line for PDT trunking / conventional intercom, transmitting PDT trunking / conventional intercom radio frequency signals.

[0022] The communication antenna 2 has an independent internal power supply, with the antenna core and antenna ground as two power supply points. The satellite communication radio frequency signal is connected to the antenna core through the cable core, which is an independent power supply point. The PDT trunking / conventional intercom radio frequency signal is connected to the antenna ground through the metal anti-interference shielding layer 51, which is an independent power supply point. The two signals are physically isolated and do not interfere with each other. They share the antenna radiator to complete signal transmission and reception. Depending on the user's needs, one of the two can be used. Compared with the traditional implementation scheme, it completely eliminates radio frequency devices such as radio frequency switches, combiners, and duplexers, and realizes dual-mode signal transmission with a pure physical structure.

[0023] The communication antenna 2 includes an antenna body 21 and an antenna connecting nut seat 22 threadedly connected to the antenna body 21. The device body 1 is provided with an antenna mounting position that mates with the antenna connecting nut seat 22. The antenna connecting nut seat 22 is located in the antenna mounting position. An electrical connection plate 23 is provided at the end of the antenna connecting nut seat 22 away from the antenna body 21. An electrical connection seat 24 that mates with the coaxial RF cable 5 is provided on the electrical connection plate 23. The electrical connection seat 24 includes a connection seat body 241 and a connection seat inner core 242. A signal pin is provided inside the antenna body 21. One end of the connection seat inner core 242 is connected to the signal pin. The signal pin and the connection seat inner core 242 form the antenna inner core. The connection seat body 241 is electrically connected to the antenna connecting nut seat 22. The antenna connecting nut seat 22 and the connection seat body 241 form the antenna ground.

[0024] Satellite communication component 4 includes a satellite communication mainboard, on which a communication connector 41 is provided. The communication connector 41 contains a communication pin. The coaxial radio frequency cable 5 has a first electrical connector 53 and a second metal electrical connector 54 at both ends. The first electrical connector 53 has a first cable channel that mates with the inner core of the cable. The inner core of the cable is connected to the communication pin. The second metal electrical connector 54 also has a second cable channel that mates with the inner core of the cable. The second cable channel has an isolation layer to isolate the second metal electrical connector 54 from the inner core of the cable to prevent short circuits. The second metal electrical connector 54 is electrically connected to a metal anti-interference shielding layer 51. The second metal electrical connector 54 is inserted into the electrical connector 24 and is in contact with the connector body 241. The inner core of the cable in the second cable channel is electrically connected to the inner core 242 of the connector.

[0025] In this way, a stable connection can be achieved between the inner core of the cable and the inner core of the antenna, and a stable connection can be achieved between the metal anti-interference shielding layer 51 and the antenna ground. At the same time as installing the second metal electrical connector 54, the conduction of two signals can be realized.

[0026] The intercom communication device 3 includes an intercom communication motherboard, on which an electrical connection solder joint 31 is provided. The electrical connection solder joint 31 is connected to the metal anti-interference shielding layer 51 by electric soldering.

[0027] Stable communication between the metal anti-interference shielding layer 51 and the intercom communication motherboard is achieved by electro-soldering.

[0028] The intercom communication device 3 and the satellite communication device 4 are arranged side by side, with the intercom communication device 3 located on the side closer to the communication antenna 2.

[0029] The walkie-talkie 3 and satellite communication 4 are provided with cable routing clearances on their sides, and the coaxial radio frequency cable 5 is installed in the cable routing clearances.

[0030] By setting up routing avoidance spaces, the position of the coaxial RF cable 5 can be located, while avoiding interference between the coaxial RF cable 5 and other components in the equipment.

[0031] Performance testing was conducted for this embodiment: 1. Performance test of PDT trunking / regular intercom like Figure 4 As shown, the meaning of the title of Test Example 1 is: Phi=0: This indicates that the test is of the antenna's YZ vertical cross-section (corresponding to the coordinate system in the lower left corner of the figure), which is the antenna's elevation radiation characteristics; freq=400MHz: The operating frequency for this test is one of the most commonly used core frequency bands for PDT trunking communication.

[0032] (1) Coordinate axes and scales Circular scale (0°-360°): indicates different directions in space, 0° is the zenith direction, and 180° is the ground direction; Radial scale: Indicates the antenna's radiation gain, measured in dBi. A larger value (closer to the outer ring) indicates stronger signal transmission / reception capability in that direction; a larger negative value indicates weaker radiation in that direction.

[0033] (2) Red curve This represents the gain distribution of the antenna in various directions within the vertical plane where Phi=0 at a frequency of 400MHz. From... Figure 4 It can be seen from this: The antenna has high gain (approximately -3dBi to -9dBi) in the 30°-300° and 120°-210° directions. The antenna has low gain (below -9 dBi) in the 60°-120° and 210°-300° directions. Overall, it exhibits typical vertical radiation characteristics of a handheld walkie-talkie antenna, which can meet the basic coverage requirements for outdoor walkie-talkies.

[0034] like Figure 5 As shown, the meaning of the title of Test Example 2 is: Phi=90: In spherical coordinates, Phi represents the azimuth angle (the angle of rotation around the Z-axis, measured from the positive X-axis direction). Phi=90° means that the test is conducted in the XZ perpendicular plane (corresponding to the coordinate system in the lower left corner of the figure: Z-axis upward, X-axis to the right, Y-axis perpendicular to the paper and inward).

[0035] and Figure 4 The relationship between the two is that they are two mutually orthogonal vertical planes (Phi=0 corresponds to the YZ plane, Phi=90 corresponds to the XZ plane), which together describe the radiation characteristics of the antenna in all vertical directions.

[0036] freq=400MHz: The operating frequency for this test is the standard core frequency of PDT regular walkie-talkies and civilian walkie-talkies.

[0037] (1) Coordinate axes and scales Circular scale (0°-360°): indicates different directions in space, 0° is the zenith direction, and 180° is the ground direction; Radial scale: Indicates the antenna's radiation gain, measured in dBi. A larger value (closer to the outer ring) indicates stronger signal transmission / reception capability in that direction; a larger negative value indicates weaker radiation in that direction.

[0038] (2) Red curve from Figure 5 As can be seen, the antenna cannot maintain a high gain (approximately -3dBi to -9dBi) in any direction, and the antenna has better radiation uniformity in the XZ plane with no obvious directional defects.

[0039] like Figure 6 As shown, the meaning of the title of Test Example 3 is: Theta=90: In spherical coordinates, Theta represents the polar angle (measured from the positive direction of the Z-axis). Theta=90 means that the test is conducted on the XY horizontal plane perpendicular to the Z-axis (corresponding to the coordinate system in the lower left corner of the figure), which is the azimuth radiation characteristic of the antenna. This is the direction that handheld walkie-talkies are most concerned about (when the user uses the antenna, it is placed vertically, and communication mainly occurs in the horizontal plane).

[0040] freq=400MHz: The operating frequency for this test is the standard core frequency of PDT regular walkie-talkies and civilian walkie-talkies.

[0041] The coordinate system is located in the lower left corner: the X-axis points to the right, the Y-axis points upward, and the Z-axis is perpendicular to the paper and points outward (a circle with a cross indicates that the negative direction of the Z-axis points inward).

[0042] (1) Coordinate axes and scales Circular scale (0°-360°): Represents the azimuth angle in the horizontal plane. 0° is the positive X-axis direction (right), 90° is the positive Y-axis direction (up), 180° is the negative X-axis direction (left), and 270° is the negative Y-axis direction (down).

[0043] Radial scale: Indicates the antenna's radiation gain, measured in dBi. A larger value (closer to the outer ring) indicates stronger signal transmission / reception capability in that direction; a larger negative value indicates weaker radiation in that direction.

[0044] (2) Red curve from Figure 6As can be seen from this, the main radiation directions are 90° (positive Y-axis direction, front) and 270° (negative Y-axis direction, rear), with a gain of approximately -6dBi, which are the main effective directions for intercom communication.

[0045] Weak radiation directions: 0° (positive X-axis direction, right) and 180° (negative X-axis direction, left), with a gain of approximately -30dBi. This is due to the shielding and reflection effects of the metal structure of the device body on the antenna radiation.

[0046] Overall characteristics: Although it is not an ideal omnidirectional circle, it fully meets the actual needs of handheld walkie-talkies. When the user is making a call, the antenna is usually pointed diagonally upward, and the communication distance in the front-to-back direction is much greater than that in the left-to-right direction.

[0047] Based on the radiation pattern test results of three orthogonal planes at 400MHz (PDT trunking / conventional intercom core frequency band): there are no obvious obstacles to PDT trunking / conventional intercom antenna communication, and no obvious performance degradation was observed in the innovative structure of Tiantong satellite + PDT shared antenna.

[0048] 2. Tiantong Satellite Communication Performance Test like Figure 7 As shown, Test Example 1 shows the radiation pattern of communication antenna 2 set at an elevation angle of 55°, a common setting for Tiantong satellites; as... Figure 8 As shown, Test Example 2 shows the radiation pattern of communication antenna 2 set at an elevation angle of 45°, a common setting for Tiantong satellites; as shown... Figure 9 As shown, Test Example 3 shows the radiation pattern of communication antenna 2 set at an elevation angle of 30°, which is commonly used for Tiantong satellites.

[0049] (1) Basic test information The test platform is the SatEnv antenna test system of Satimo (Microwave Vision), which adopts a passive test mode, fixes the elevation angle (matching the common air elevation angle of satellites), and scans the azimuth angle of the horizontal plane to obtain polar coordinate results; The diagram contains 6 frequency points, fully covering the TianTong S-band: 1980MHz, 1995MHz, and 2010MHz belong to the uplink transmission frequency band of TianTong terminals, and 2170MHz, 2185MHz, and 2200MHz belong to the downlink reception frequency band.

[0050] (2) Detailed interpretation of charts The circumferential scale represents the 360° azimuth angle on the horizontal plane, and the radial scale is the radiation gain (unit dB). The closer to the outer circle is to the corresponding direction, the stronger the signal transmission and reception capability. The closer the curve is to a circle, the better the omnidirectionality. Observe the radiation patterns of the six colored curves corresponding to the six characteristic frequency points, such as... Figures 7-9As shown, the full-band curve has no obvious discontinuities and the trend is relatively smooth, indicating that the antenna has excellent radiation characteristics stability within the entire operating bandwidth of the Tiantong antenna.

[0051] Based on the performance test results of Tiantong satellite communication: there are no obvious obstacles to Tiantong satellite communication, and the innovative structure of using Tiantong satellite + PDT shared antenna has not shown obvious performance degradation.

[0052] As can be seen from the above, the beneficial effects of the present invention are as follows: By adopting its mechanism, it can effectively solve the problems of complex structure and signal transmission loss in the existing multi-mode fusion intercom terminal, which integrates satellite communication and intercom communication. Through the cooperation between the satellite communication component 4, the inner core of the cable and the inner core of the antenna, and the cooperation between the intercom communication component 3, the metal anti-interference shielding layer 51 and the antenna ground, it is possible to achieve both satellite communication and intercom communication transmission and reception through a single communication antenna 2. By utilizing the structural characteristics of the coaxial radio frequency cable 5 and cooperating with the antenna ground of the communication antenna 2, another communication signal can be transmitted and received. Only a single coaxial radio frequency cable 5 is used to complete the transmission of two communication signals, which simplifies the structure and enables the transmission of two signals. It reduces the loss of communication signals during transmission caused by the relay switch in the traditional scheme and can meet the development needs of miniaturization design and low signal loss of multi-mode fusion terminals.

[0053] The specific embodiments described above are preferred embodiments of the present invention and are not intended to limit the specific scope of the present invention. The scope of the present invention includes, but is not limited to, these specific embodiments. All equivalent changes made in accordance with the present invention are within the protection scope of the present invention.

Claims

1. A communication device with a shared antenna structure for satellite communication and PDT trunking intercom, characterized in that: The device includes a main body and a communication antenna. The main body houses an intercom communication component, a satellite communication component, and a coaxial radio frequency cable. The coaxial radio frequency cable includes an inner cable core, an insulating layer, a metal anti-interference shielding layer, and an insulating protective sheath, arranged from the inside out. One end of the inner cable core is electrically connected to the satellite communication component. The communication antenna has an antenna ground and an antenna core. The other end of the inner cable core is electrically connected to the antenna core. The satellite communication component can transmit and receive satellite communication through a mating fit between the inner cable core and the antenna core. The coaxial radio frequency cable has an exposed opening that mates with the metal anti-interference shielding layer. The intercom communication component can pass through this exposed opening and be electrically connected to the metal anti-interference shielding layer. One end of the metal anti-interference shielding layer is connected to the antenna ground. The intercom communication component can transmit and receive intercom communication through the antenna ground in conjunction with the metal anti-interference shielding layer.

2. The communication device with a shared antenna structure for satellite communication and PDT trunking intercom as described in claim 1, characterized in that: The communication antenna includes an antenna body that is threadedly connected to the antenna body. The device body has an antenna mounting position that mates with the antenna connecting nut. The antenna connecting nut is located in the antenna mounting position. An electrical connection plate is located at the end of the antenna connecting nut away from the antenna body. An electrical connector that mates with the coaxial RF cable is located on the electrical connection plate. The electrical connector includes a connector body and a connector inner core. A signal pin is located inside the antenna body. One end of the connector inner core is connected to the signal pin. The signal pin and the connector inner core form the antenna inner core. The connector body is electrically connected to the antenna connecting nut. The antenna connecting nut and the connector body together form the antenna ground.

3. The communication device with a shared antenna structure for satellite communication and PDT trunking intercom as described in claim 2, characterized in that: The satellite communication device includes a satellite communication mainboard with a communication connector. The communication connector contains a communication pin. A first electrical connector and a second metal electrical connector are respectively provided at both ends of the coaxial radio frequency cable. The first electrical connector has a first cable channel that mates with the inner core of the cable. The inner core of the cable is connected to the communication pin. The second metal electrical connector also has a second cable channel that mates with the inner core of the cable. The second cable channel has an isolation layer to isolate the second metal electrical connector from the inner core of the cable and prevent short circuits. The second metal electrical connector is electrically connected to the metal anti-interference shielding layer. The second metal electrical connector is inserted into the electrical connector and makes contact with the main body of the connector. The inner core of the cable in the second cable channel is electrically connected to the inner core of the connector.

4. The communication device with a shared antenna structure for satellite communication and PDT trunking intercom as described in claim 1, characterized in that: The intercom communication device includes an intercom communication motherboard, on which electrical connection solder joints are provided, and the electrical connection solder joints are connected to the metal anti-interference shielding layer by electric soldering.

5. The communication device with a shared antenna structure for satellite communication and PDT trunking intercom according to any one of claims 1-4, characterized in that: The intercom communication device and the satellite communication device are arranged side by side, with the intercom communication device located on the side closer to the communication antenna.

6. The communication device with a shared antenna structure for satellite communication and PDT trunking intercom as described in claim 5, characterized in that: The intercom communication device and the satellite communication device are provided with cable routing clearance positions on their sides, and the coaxial radio frequency cable is installed in the cable routing clearance positions.

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