Multi-frequency multi-function combined multiplexing antenna

Abstract

A multi-frequency multifunctional combined multiplexing antenna, comprising a plurality of antenna radiation units, the plurality of antenna radiation units comprising, from top to bottom, a 9GHz frequency band antenna, a VHF frequency band antenna, an S / L dual-frequency band circularly polarized antenna and an L frequency band circularly polarized antenna; an L frequency band microstrip antenna circularly polarized feed network, an S / L dual-frequency band antenna circularly polarized feed network and a VHF frequency band antenna feed network below the L frequency band circularly polarized antenna are connected to a mounting flange, the mounting flange is connected to the L frequency band circularly polarized antenna through a mounting stand column, a coaxial cable of the L frequency band circularly polarized antenna passes through the S / L dual-frequency band circularly polarized antenna and is fixed; the S / L dual-frequency band circularly polarized antenna and the VHF frequency band antenna are connected, a magnetic ring is arranged on the VHF frequency band antenna, and the VHF frequency band antenna and the 9GHz frequency band antenna are connected; the present application integrates the antennas of multiple frequency bands based on antenna integration technology and combined multiplexing technology, realizes multi-frequency band and miniaturization, covers eight frequency bands and can provide near, medium and long distance alarm, short message communication and voice call functions.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of life-saving communication, in particular to a multi-frequency multi-functional combined multiplexing antenna. BACKGROUND

[0002] With the development of electronic technology, more and more satellite communication means can be applied to long-distance communication, and the demand for satellite communication capability of the communication navigation system is further expanded. Due to the large number of frequency bands, and the fact that satellite communication is mostly in circular polarization mode (pointing to the sky), a horizontal arrangement and a stacked arrangement are generally used to achieve the performance of covering multiple frequency bands. However, the horizontal arrangement requires a larger installation space, and when the stacked arrangement is used, the top antenna has a shielding effect on the bottom antenna.

[0003] The Chinese patent "Three-in-one buoy antenna" (application number: 200810132609.9) discloses a three-in-one buoy antenna that comprehensively uses a Beidou satellite antenna, a 9GHz antenna, and a VHF communication antenna, which can effectively cover long, medium, and short distances. Although the "three-in-one buoy antenna" covers multiple frequency bands using antenna integration technology, it has fewer coverage frequencies in the Beidou frequency band and cannot achieve message and voice communication.

[0004] The Chinese patent "Multi-band antenna and combined multiplexing method for implementing the antenna" (application number: 201610268910.7) discloses a multi-band antenna provided with a VHF frequency band antenna, an S frequency band antenna, and an L frequency band antenna multiple antenna radiation units. The S frequency band is a single-frequency circularly polarized antenna, the L frequency band antenna is a dual-frequency circularly polarized antenna, and the VHF frequency band antenna is a spiral antenna. The multi-band antenna can effectively transmit and receive signals at each frequency point and can provide line-of-sight medium and long-distance alarm, message, and voice communication. However, the multi-band antenna does not cover the commonly used 9GHz communication frequency band, and the size is too large.

[0005] Therefore, there is an urgent need for a multi-frequency multi-functional combined multiplexing antenna that can cover all frequency bands while considering miniaturization and applying to the field of life-saving communication. SUMMARY

[0006] In order to overcome the shortcomings of the prior art, the purpose of the present application is to provide a multi-frequency multi-functional combined multiplexing antenna that can cover all frequency bands while considering miniaturization.

[0007] In order to achieve the above purpose, the technical scheme adopted by the present application is as follows:

[0008] A multi-frequency multi-functional combined multiplexing antenna includes multiple antenna radiation units, which include a 9GHz frequency band antenna 1, a VHF frequency band antenna 2, an S / L dual-frequency circularly polarized antenna 3, and an L frequency band circularly polarized antenna 4 placed in order from top to bottom.

[0009] The L-band microstrip antenna circular polarization feed network 5 below the L-band circular polarization antenna 4, the S / L dual-band antenna circular polarization feed network 6, and the VHF-band antenna feed network 7 are connected to the mounting flange 8, the mounting flange 8 is connected to the L-band circular polarization antenna 4 through the mounting stand 9, the first coaxial cable 11 of the S / L dual-band circular polarization antenna 4 passes through the L-band circular polarization antenna 3 and is connected and fixed, the S / L dual-band circular polarization antenna 3 is connected to the VHF-band antenna 2, the VHF-band antenna 2 is provided with a magnetic ring 10, and the VHF-band antenna 2 is connected to the 9GHz-band antenna 1.

[0010] The 9GHz-band antenna 1 is a horizontal polarization omnidirectional radiation antenna and is composed of four layers of dielectric plates.

[0011] The VHF-band antenna 2 is a S / L dual-band antenna, the balun cable 12 of the VHF-band antenna 2 is used as a 9GHz-band antenna 1 and its feed line by using a combination multiplexing technology, at the same time, the magnetic ring 10 is added below the 9GHz-band antenna 1 feed cable line, which is equivalent to an open circuit in the VHF band, and two poles of the VHF-band antenna 2 are constructed, that is, the VHF feed point horizontal line is taken as a division point, the upper part is a VHF-band antenna 2 radiator, and the lower part is an equivalent metal ground structure.

[0012] The S / L dual-band circular polarization antenna 3 realizes dual-band and dual-polarization performance by adopting a double-branch cross-dipole antenna, realizes circular polarization performance by connecting the S / L dual-band circular polarization antenna feed network 6 through the coaxial cable 11, and is connected with four coaxial cables 11, which are baluns and feed cables, respectively.

[0013] The L-band circular polarization antenna 4 realizes dual-polarization performance by connecting four metal probes with a differential feed network 13, and realizes circular polarization by connecting with an L-band circular polarization feed network, and the differential feed network 13 and the L-band circular polarization feed network constitute the L-band microstrip antenna circular polarization feed network 5.

[0014] The differential feed network 13 is realized by two completely symmetrical 180° phase shifters 14.

[0015] The L-band microstrip antenna circular polarization feed network 5 and the S / L dual-band circular polarization antenna feed network 6 adopt the Lange coupler type.

[0016] The beneficial effects of the present application are as follows:

[0017] The application integrates multi-frequency antennas together based on antenna integration technology and combined multiplexing technology, realizes multi-frequency band and miniaturization characteristics, and covers 8 frequency bands to provide near, medium and long distance alarm, short message communication and voice call functions.

[0018] The S / L dual-band circularly polarized antenna 3 of the application adopts a dual-polarized cross-dipole antenna, has good out-of-band suppression characteristics, can eliminate the coupling influence on the L-band circularly polarized antenna 4, and improves the overall performance of the composite antenna.

[0019] Based on the combined multiplexing technology, the 9GHz frequency band antenna 1 and its feed line are used as the radiator of the VHF frequency band antenna 2, and the two poles of the VHF antenna are constructed by using a magnetic ring to perfect the design of the VHF antenna.

[0020] The application adopts a thick dielectric plate with relatively high dielectric constant, and uses an analytical method to complete the matching technology of the VHF antenna, and realizes the performance of antenna miniaturization. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the application (omitting the mounting flange).

[0022] Figure 2 It is a schematic diagram of the application after disassembly.

[0023] Figure 3 It is a side view of the application.

[0024] Figure 4 It is a top view of the application.

[0025] Figure 5 It is a bottom view of the application.

[0026] Figure 6 It is a simulation model diagram of the 9GHz frequency band antenna 1 in the application.

[0027] Figure 7 It is a model diagram of the S / L dual-band circularly polarized antenna 3 in the application.

[0028] Figure 8 It is a model diagram of the L-band circularly polarized antenna 4 in the application.

[0029] Figure 9 It is a differential feed network of the L-band circularly polarized antenna 4 in the application.

[0030] Figure 10 It is a model diagram of the VHF frequency band antenna 2 in the application.

[0031] Figure 11 It is a schematic diagram of the L-band microstrip antenna circularly polarized feed network 5 in the application.

[0032] Figure 12 S / L dual-band circularly polarized antenna feed network 6 schematic diagram in the application.

[0033] Figure 13 VHF band antenna feed network 7 circuit diagram in the application.

[0034] Figure 14 Far field radiation pattern of L-band circularly polarized antenna 4 in the multi-frequency multi-functional combined multiplexing antenna (f = 1207.14 MHz).

[0035] Figure 15 Far field radiation pattern of L-band circularly polarized antenna 4 in the multi-frequency multi-functional combined multiplexing antenna (f = 1268.52 MHz).

[0036] Figure 16 Far field radiation pattern of S / L dual-band circularly polarized antenna 3 in the multi-frequency multi-functional combined multiplexing antenna (f = 1615.68 MHz).

[0037] Figure 17 Far field radiation pattern of S / L dual-band circularly polarized antenna 3 in the multi-frequency multi-functional combined multiplexing antenna (f = 2491.75 MHz).

[0038] Figure 18 Far field radiation pattern of VHF band antenna 2 in the multi-frequency multi-functional combined multiplexing antenna (f = 121.5 MHz).

[0039] Figure 19 Far field radiation pattern of VHF band antenna 2 in the multi-frequency multi-functional combined multiplexing antenna (f = 157.5 MHz).

[0040] Figure 20 Far field radiation pattern of VHF band antenna 2 in the multi-frequency multi-functional combined multiplexing antenna (f = 162.5 MHz).

[0041] Figure 21 Far field radiation pattern of 9 GHz band antenna 1 in the multi-frequency multi-functional combined multiplexing antenna (f = 9300 MHz horizontal plane).

[0042] Figure 22 Far field radiation pattern of 9 GHz band antenna 1 in the multi-frequency multi-functional combined multiplexing antenna (f = 9300 MHz vertical plane).

[0043] Figure 23 Standing wave simulation result diagram of S / L dual-band circularly polarized antenna 3 in the multi-frequency multi-functional combined multiplexing antenna.

[0044] Figure 24The figure shows the standing wave simulation results of L-band circularly polarized antenna 4 in a multi-frequency multi-functional combined multiplexed antenna.

[0045] Figure 25 The figure shows the standing wave simulation results of antenna 1 in the 9GHz band of the multi-frequency multi-functional combined multiplexed antenna.

[0046] Figure 26 The figure shows the simulation results of the standing wave of antenna 2 in the VHF band of the multi-frequency multi-functional combined multiplexed antenna. Detailed Implementation

[0047] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0048] like Figures 1-5 As shown, a multi-frequency, multi-functional combined multiplexed antenna includes multiple antenna radiating elements for radiating and receiving electromagnetic energy into space. These antenna radiating elements include, from top to bottom, a 9GHz band antenna 1, a VHF band antenna 2, an S / L dual-band circularly polarized antenna 3, and an L-band circularly polarized antenna 4. The 9GHz band antenna 1 operates at frequencies of 9200MHz to 9500MHz, the VHF band antenna 2 operates at frequencies of 121.5MHz, 157-158MHz, and 162.5MHz, and the S / L dual-band circularly polarized antenna 3 operates at frequencies of... The operating frequencies of the L-band circularly polarized antenna 4 are 1207.14±10.23MHz and 1268.52±10.23MHz, respectively. The polarization of the VHF band antenna 2 is vertical. The polarization of the 9GHz band antenna 1 is horizontal. The L-band circularly polarized antenna 4, the S / L dual-band circularly polarized antenna 3, and the VHF band antenna 2 are respectively connected to the L-band microstrip antenna circularly polarized feed network 5, the S / L dual-band circularly polarized antenna feed network 6, and the VHF band antenna feed network 7.

[0049] The L-band microstrip antenna circular polarization feed network 5, the S / L dual-band antenna circular polarization feed network 6, and the VHF band antenna feed network 7 are connected to the first mounting flange 8. The mounting flange 8 is connected to the L-band circular polarization antenna 4. The mounting flange 8 is connected to the L-band circular polarization antenna 4 through the mounting column 9. The coaxial cable 11 of the S / L dual-band circular polarization antenna 4 passes through the L-band circular polarization antenna 3 and is connected and fixed by welding. The S / L dual-band circular polarization antenna 3 is connected to the VHF band antenna 2. The VHF band antenna 2 is provided with a magnetic ring 10. The VHF band antenna 2 is connected to the 9GHz band antenna 1.

[0050] like Figure 6As shown, the 9GHz band antenna 1 is a horizontal polarization omnidirectional radiation antenna, which is composed of 4 layers of dielectric plates. The thickness of the first dielectric plate 1-1 and the fourth dielectric plate 1-4 is 0.508mm, and the thickness of the second dielectric plate 1-2 and the third dielectric plate 1-3 is 0.787mm respectively. The material of the dielectric plates is Rogers 5880 with a dielectric constant of 2.2.

[0051] As shown in the figure, Figure 7 As shown, the S / L dual-band circularly polarized antenna 3 realizes dual-band and dual-polarization performance by adopting a double-branch cross-dipole antenna, and realizes circular polarization performance by connecting with the S / L dual-band circularly polarized antenna feed network 6 through the coaxial cable 11. The dielectric plate has a thickness of 1.5mm and a dielectric constant of 2.65, which is F4BM. The antenna is connected with 4 coaxial cables 11, which are baluns and feed cables respectively. Two balun structures pass through the S / L dual-band circularly polarized antenna 3 and extend upwards, which are used as the feed cables of the VHF band antenna 2 and the 9GHz band antenna 1 respectively.

[0052] As shown in the figure, Figure 8 As shown, the L-band circularly polarized antenna 4 realizes dual-polarization performance by connecting with the differential feed network 13 through 4 metal probes, and realizes circular polarization by connecting with the L-band circularly polarized feed network. The differential feed network 13 and the L-band circularly polarized feed network constitute the L-band microstrip antenna circularly polarized feed network 5, which uses a dielectric plate with a thickness of 16mm and a dielectric constant of 4.4, which is FR4.

[0053] As shown in the figure, Figure 9 As shown, the differential feed network 13 is realized by two completely symmetrical 180° phase shifters 14. The dielectric plate uses Rogers 3003 with a thickness of 1mm and a dielectric constant of 3.

[0054] As shown in the figure, Figure 10 As shown, the VHF band antenna 2 feed cable is the balun cable 12 of the S / L dual-band antenna. By using the combination multiplexing technology, the 9GHz band antenna 1 and its feed line are regarded as the VHF band radiator. At the same time, a magnetic ring 10 is added below the 9GHz band antenna 1 feed cable, which is equivalent to an open circuit in the VHF band, thereby constructing two poles of the VHF band antenna 2, i.e. taking the VHF feed point horizontal line as the dividing point, the upper part is the VHF band antenna 2 radiator, and the lower part is the equivalent metal ground structure.

[0055] As shown in the figure, Figure 11 As shown, the L-band microstrip antenna circularly polarized feed network 5 adopts the Lange coupler type, which has the characteristics of miniaturization and low loss. The dielectric plate uses Rogers 3003 with a thickness of 0.762mm and a dielectric constant of 3.

[0056] As shown in the figure, Figure 12As shown, the S / L dual-band circularly polarized antenna feed network 6 adopts the type of Lange coupler, with the characteristics of miniaturization and low loss; the dielectric plate adopts Rogers 3003 with a thickness of 0.762 mm and a dielectric constant of 3.

[0057] As shown in Figure 13 , the VHF-band antenna feed network 7 and the VHF-band antenna 2 are connected to complete impedance matching, so that the VHF-band antenna 2 meets the engineering requirements in the standing wave in the working frequency band.

[0058] The far-field radiation direction of the L-band circularly polarized antenna 4 is as shown in Figures 14-15 (f=1207.14 MHz, f=1268.52 MHz), it can be seen from the figure that the main polarization gain is ≥0 dB at an elevation angle of 30°-90° at each frequency, meeting the design requirements.

[0059] The far-field radiation pattern of the S / L dual-band circularly polarized antenna 3 is as shown in Figures 16-17 (f=1615.68 MHz, f=2491.75 MHz), it can be seen from the figure that the main polarization gain is ≥0 dB at an elevation angle of 45°-90° at 1615 MHz, and the main polarization gain is ≥0 dB at an elevation angle of 30°-90° at 2491 MHz, meeting the design requirements.

[0060] The far-field radiation pattern of the VHF-band antenna 2 is as shown in Figures 18-20 (f=121.5 MHz, f=157.5 MHz, f=162.5 MHz), it can be seen from the figure that the VHF-band antenna has good omnidirectional radiation performance, meeting the design requirements.

[0061] The far-field radiation pattern of the 9 GHz-band antenna 1 is as shown in Figures 21-22 (vertical plane, horizontal plane), it can be seen from the figure that the 9 GHz antenna has a 3 dB beam width ≥12.5° in the horizontal plane, and has good omnidirectional radiation performance in the horizontal direction, meeting the design requirements.

[0062] The standing wave simulation result diagram of each frequency band of the multi-frequency and multi-functional combined multiplexing antenna is as shown in Figures 23-26 , it can be seen that the standing wave of each frequency band is ≤1.5, meeting the design requirements.

Claims

1. A multi-frequency multi-function combined multiplexing antenna comprising a plurality of antenna radiating elements, characterized in that: The multiple antenna radiation units include, from top to bottom, a 9GHz frequency band antenna (1), a VHF frequency band antenna (2), an S / L dual frequency band circularly polarized antenna (3), and an L frequency band circularly polarized antenna (4); The L frequency band microstrip antenna circularly polarized feed network (5) below the L frequency band circularly polarized antenna (4), the S / L dual frequency band antenna circularly polarized feed network (6), and the VHF frequency band antenna feed network (7) are connected to the mounting flange (8), the mounting flange (8) is connected to the L frequency band circularly polarized antenna (4) through the mounting column (9), the coaxial cable (11) of the L frequency band circularly polarized antenna (4) passes through the S / L dual frequency band circularly polarized antenna (3) and is connected and fixed, the S / L dual frequency band circularly polarized antenna (3) and the VHF frequency band antenna (2) are connected, the VHF frequency band antenna (2) is provided with a magnetic ring (10), and the VHF frequency band antenna (2) and the 9GHz frequency band antenna (1) are connected. The VHF frequency band antenna (2) is a balun cable (12) of the S / L dual frequency antenna, the 9GHz frequency band antenna (1) and its feed cable are used as a VHF frequency band radiator by using a combination multiplexing technology, a magnetic ring (10) is added below the 9GHz frequency band antenna (1) feed cable, an open circuit is equivalent to the VHF frequency band, and two poles of the VHF frequency band antenna (2) are constructed, that is, a VHF feed point horizontal line is taken as a division point, an upper part is a VHF frequency band antenna (2) radiator, and a lower part is an equivalent metal ground structure.

2. The multi-frequency multi-function combined reconfigurable antenna according to claim 1, characterized in that: The 9GHz frequency band antenna (1) is a horizontal polarization omnidirectional radiation antenna composed of four layers of dielectric plates.

3. The multi-frequency multi-function combined reconfigurable antenna according to claim 1, wherein: The S / L dual frequency band circularly polarized antenna (3) realizes dual-frequency dual-polarization performance by adopting a double-branch cross-dipole antenna, realizes circular polarization performance by being connected to the S / L dual frequency band circularly polarized feed network (6) through the coaxial cable (11), and is connected to four coaxial cables (11), which are baluns and feed cables, respectively.

4. The multi-frequency multi-function combined reconfigurable antenna according to claim 1, wherein: The L frequency band circularly polarized antenna (4) realizes dual-polarization performance by being connected to the differential feed network (13) through four metal probes, realizes circular polarization by being connected to the L frequency band circularly polarized feed network, and forms the L frequency band microstrip antenna circularly polarized feed network (5) with the differential feed network (13) and the L frequency band circularly polarized feed network.

5. The multi-frequency multi-function combined reconfigurable antenna according to claim 4, characterized in that: The differential feed network (13) is realized by two completely symmetrical 180° phase shifters (14).

6. The multi-frequency multi-function combined reconfigurable antenna according to claim 1, wherein: The L frequency band microstrip antenna circularly polarized feed network (5) and the S / L dual frequency band circularly polarized feed network (6) adopt a Lange coupler type.

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