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CN-122026070-A - Handheld Tiantong low-rail fusion type antenna

CN122026070ACN 122026070 ACN122026070 ACN 122026070ACN-122026070-A

Abstract

The invention discloses a handheld antenna-through low-orbit fusion type antenna, which belongs to the technical field of satellite communication antennas and comprises an antenna housing, a low-orbit antenna medium load, a low-orbit antenna array, an antenna-through antenna array, a feed printed circuit board, a radio frequency connector and an antenna base, wherein the antenna housing and the base are sealed to form a containing cavity, a nested double-four-arm spiral array is arranged in the antenna housing, the low-orbit array is attached to the outer side of the medium through the medium load, the antenna-through array is of an inner layer structure, and the feed ends of the antenna-through array and the antenna-through antenna array are welded with a printed board integrated with a phase shifting, filtering and feed module. The antenna enables the double-array to work in an axial mode through differential parameter design, combines filtering feed and grounding coupling to realize double-frequency resonance and frequency band isolation, can realize simultaneous communication of double frequency bands, has balanced gain and wave beam width and protection level IP65, and meets the application requirements of miniaturization, high reliability and multi-frequency band cooperative communication of the handheld satellite communication terminal.

Inventors

  • WU XINGJUN
  • WANG BING
  • WANG LUN
  • WANG YUE
  • Song Bobin
  • SHANG SHANXUE
  • ZHAO JIAYU

Assignees

  • 北京天海达科技有限公司

Dates

Publication Date
20260512
Application Date
20260416

Claims (10)

  1. 1. The handheld antenna low-rail fusion type antenna is characterized by comprising an antenna housing (1), a low-rail antenna medium load (2), a low-rail antenna array (3), an antenna array (4), a feed printed circuit board (5), a radio frequency connector (6) and an antenna base (7); the antenna housing (1) and the antenna base (7) are buckled in a sealing mode to form a closed accommodating cavity, the antenna array (4), the low-rail antenna array (3) and the low-rail antenna medium loading (2) and the feeding printed circuit board (5) are arranged in the accommodating cavity, one end of the radio frequency connector (6) extends to the accommodating cavity to be electrically connected with the feeding printed circuit board (5) and the other end of the radio frequency connector is exposed out of the antenna base (7), the low-rail antenna medium loading (2) is of a cylindrical structure, the low-rail antenna array (3) is bonded on the outer side of the low-rail antenna array (3), the low-rail antenna array (3) is of an outer-layer four-arm spiral structure and is nested on the outer side of the antenna array (4), the antenna array (4) is of an inner-layer four-arm spiral structure, the feeding ends of the antenna array (4) and the low-rail antenna array (3) are all fixed with the feeding printed circuit board (5) in a welding mode, the feeding printed circuit board (5) is integrated with, filtering and a module, and circular polarization phase shifting dual-band feeding of antenna and low-rail radiation is achieved Frequency band isolation and double-frequency resonance feeding.
  2. 2. The handheld antenna according to claim 1, wherein the antenna element (4) comprises a second bottom layer 3M back adhesive (41), a second low-frequency radiation arm (42) and a second high-frequency radiation arm (43), the diameter of the antenna element (4) is 14mm, a four-arm spiral structure is adopted, the length of the spiral arm is 5 λfs/4, λfs is the free space wavelength corresponding to an antenna center frequency point 2085MHz, the number of turns of the antenna element (4) is 5, the height of the radiator is 105mm, the included angle between the spiral arm and the X axis is 48 degrees in a plane unfolding state, the second low-frequency radiation arm (42) and the second high-frequency radiation arm (43) are alternately distributed to form a four-arm radiation structure, the second bottom layer 3M back adhesive (41) is arranged on the left side of the back of the antenna element (4), the width of the second bottom layer 3M adhesive (41) is 2mm, and the antenna element (4) is used for fixing the antenna element (4) in a spiral coil-wound configuration.
  3. 3. The handheld antenna low-rail fusion antenna according to claim 1, wherein the low-rail antenna array (3) comprises a first bottom layer 3M back adhesive (31), a first low-frequency radiation arm (32) and a first high-frequency radiation arm (33), the diameter of the low-rail antenna array (3) is 17mm, a four-arm spiral structure is adopted, the length of the spiral arm is 3 lambda fL/4, lambda fL is free space wavelength corresponding to a low-rail center frequency point 1596.5MHz, the number of turns of the low-rail antenna array (3) is 3, the radiator height is 85mm after low-rail antenna medium loading (2) is optimized, the included angle between the spiral arm and an X axis is 48 degrees in a plane unfolding state, the first low-frequency radiation arm (32) and the first high-frequency radiation arm (33) are alternately distributed to form a four-arm radiation structure, and the first bottom layer 3M back adhesive (31) is entirely covered on the back of the low-rail antenna medium loading (2) so that the low-rail antenna array (3) is attached to the surface of the low-rail antenna array (2).
  4. 4. The handheld antenna low-rail fusion type antenna according to claim 1, wherein the feeding printed circuit board (5) comprises a low-rail low-frequency feeding end (51), a antenna low-frequency feeding end (52), a 6dB phase shifter (53), an LC low-pass filter (54), a antenna high-frequency grounding end (55), a low-rail high-frequency grounding end (56) and a radio-frequency connecting end (57), the feeding printed circuit board (5) adopts an FR4 substrate, the dielectric constant of the substrate is 4.5, the thickness is 1mm, the 6dB phase shifter (53) is of a microstrip line structure, phase differences of 0 DEG, 90 DEG, 180 DEG and 270 DEG are achieved, left-hand circularly polarized radiation is produced between an antenna element (4) and an antenna element (3) of a low-rail antenna, the cut-off frequency of the LC low-pass filter (54) is 1800MHz, signal isolation between the antenna and the low-rail frequency band is achieved, and the receiving-transmitting isolation degree is more than or equal to 35dB.
  5. 5. The handheld antenna low-rail fusion antenna according to claim 4, wherein the antenna low-frequency feed end (52) is electrically connected with a second low-frequency radiation arm (42) of the antenna array (4), the antenna high-frequency grounding end (55) is electrically connected with a second high-frequency radiation arm (43) of the antenna array (4), the antenna array (4) adopts a low-frequency feed and high-frequency grounding coupling mode to realize dual-frequency resonance, the low-rail low-frequency feed end (51) is electrically connected with a first low-frequency radiation arm (32) of the low-rail antenna array (3) through an LC low-pass filter (54), the low-rail high-frequency grounding end (56) is electrically connected with a first high-frequency radiation arm (33) of the low-rail antenna array (3), the low-rail antenna array (3) adopts a filtering feed and high-frequency grounding coupling mode to realize dual-frequency resonance, the radio frequency connection end (57) is fixedly connected with the radio frequency connector (6) to realize signal welding with the printed circuit board (5).
  6. 6. The handheld antenna low-rail fusion antenna according to claim 1, wherein the low-rail antenna medium load (2) is made of a PE material, the dielectric constant epsilonr=2.3 of the PE material, the dielectric loss tan δ=0.0005, and the low-rail antenna medium load (2) is of an integral cylindrical structure.
  7. 7. The handheld Tiantong low-rail fusion type antenna according to claim 1, wherein the antenna housing (1) is formed by injection molding of a high-strength PC+ABS composite type material, the thickness of the antenna housing (1) is 1.2mm, dielectric loss is less than or equal to 0.005, wave transmittance is more than or equal to 95%, the antenna base (7) is made of an aluminum alloy material through CNC processing, structural sealant is smeared on the joint surface of the antenna housing (1) and the antenna base (7), and the thickness of the sealant layer is 0.8-1.2mm.
  8. 8. The handheld Tiantong low-rail fusion antenna according to claim 1, characterized in that the radio frequency connector (6) is an SMA-J-joint with a characteristic impedance of 50 Ω and an insertion loss of 0.1dB or less.
  9. 9. The handheld antenna and low-rail fusion antenna according to any one of claims 1-8, wherein the antenna array (4) and the low-rail antenna array (3) are both made of polyimide copper-clad plates with the thickness of 0.1mm, the copper-clad plates are of single-sided copper-clad structures, and the thickness of copper layers is 1OZ.
  10. 10. The handheld Tiantong low-rail fusion antenna according to claim 1, wherein the overall height of the antenna is less than or equal to 125mm, the diameter is less than or equal to 20mm, the Tiantong frequency range covers transmission 1980-2010MHz, reception 2170-2200MHz, the low-rail frequency range covers reception 1518-1525MHz, transmission 1668-1675MHz, the Tiantong frequency range bandwidth is more than or equal to 30MHz, the low-rail frequency range bandwidth is more than or equal to 7MHz, the low-rail frequency range 3dB beam width is 90-110 DEG, the Tiantong frequency range 3dB beam width is 110-140 DEG, the low-rail transceiving frequency range gain difference is less than or equal to 0.5dB, the Tiantong + -45 DEG gain is more than or equal to 3dB, the Tiantong normal gain is more than or equal to 4.5dB, and the axial ratio is less than or equal to 3 dB.

Description

Handheld Tiantong low-rail fusion type antenna Technical Field The invention relates to the technical field of satellite communication antennas, in particular to a handheld Tiantong low-orbit fusion type antenna. Background Under the development trend of miniaturization and thinness of satellite communication terminals, the antenna is used as a core component and needs to meet the requirements of wide bandwidth wave beams, multi-band compatibility, miniaturization integration and the like. Patch antennas are widely used in the satellite navigation field due to the advantages of low profile, small weight, easy conformal and the like, but are difficult to meet the requirements of broadband and high radiation efficiency in space-through and low-orbit dual-band communication scenes. The quadrifilar helix antenna is a mainstream technology choice for antenna communication and low-rail communication antennas by virtue of good circular polarization characteristics and wide beam coverage capability. The prior related technical proposal mainly comprises: 1. The patent CN222191139U discloses a dual-receiving and dual-transmitting antenna, which is realized by adopting a dual-frequency broadband four-arm spiral antenna design and focusing dual-receiving and dual-transmitting functions, but is not optimally designed aiming at the matching property of a space-through specific frequency band and a low-rail specific frequency band, and has the defects that the designed dual-frequency broadband scheme cannot meet the requirements of the space-through full frequency band and the low-rail full frequency band simultaneously, a dead zone exists in frequency band coverage, the ② gain is unbalanced, the low-rail receiving frequency band (1518-1525 MHz) gain is 1.5dB lower than the transmitting frequency band (1668-1675 MHz), the space-through transmitting frequency band (1980-2010 MHz) is 2.5dB lower than the receiving frequency band (2170-2200 MHz), the communication stability is reduced due to the receiving gain difference, the ③ wave beam width is not matched, the 3dB wave beam width of the low-rail is smaller than 120 DEG, the space-through 3dB wave beam width exceeds 150 DEG, the directional diagram has distortion, and the beam coverage of the dual-frequency band is overlarge, and the uniform communication coverage of the whole field cannot be realized. 2. Patent CN222813948U, an adjustable hand-held integrating low-orbit and space-communication satellite communication, is characterized in that frequency selection is realized through an adjusting knob, the low-orbit and space-communication frequency bands can be covered, and the frequency band switching is realized by depending on a mechanical adjusting structure. Patent CN222813939U 'terminal antenna and equipment integrating low orbit and space communication satellite communication' also adopts frequency band selective design, and different communication frequency bands are adapted through structural adjustment, so that double-frequency-band simultaneous operation is not realized. The defects are specifically characterized in that ① structural design is complex, frequency selection is realized by depending on mechanical structures such as an adjusting knob, the size, the weight and the processing difficulty of a product are increased, the miniaturization requirement of handheld equipment is not met, ② cannot be simultaneously communicated, communication between a antenna and a low-rail cannot be synchronously performed due to frequency band switching design, application of a multi-frequency band cooperative communication scene is limited, ③ reliability is insufficient, the mechanical adjusting structure is easy to wear and contact failure after long-term use, and the working stability of an antenna is affected. In the prior art, the design thought of the antenna with the integrated antenna of the heaven and the low rail is mainly divided into two types, namely a single-band independent antenna scheme which cannot meet the requirement of dual-band simultaneous communication and an adjustable-band antenna scheme which realizes dual-band coverage through mechanical or circuit switching, but has the limitation of complex structure or incapability of simultaneous operation. Aiming at the defects of the prior art, the development of a fusion antenna which can realize the simultaneous communication of a space satellite communication terminal and a low-orbit dual-band, has balanced performance, simple structure, miniaturization and high reliability is needed to meet the application requirements of a handheld satellite communication terminal. Disclosure of Invention The invention aims to solve the technical problems that the existing antenna is incapable of achieving dual-band simultaneous communication, unbalanced in performance, complex in structure, low in miniaturization degree and poor in reliability. The antenna structure is simplified and miniaturized by designing a nested