CN114284705A - Three-frequency three-feed antenna in satellite communication - Google Patents
Three-frequency three-feed antenna in satellite communication Download PDFInfo
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- CN114284705A CN114284705A CN202111656646.1A CN202111656646A CN114284705A CN 114284705 A CN114284705 A CN 114284705A CN 202111656646 A CN202111656646 A CN 202111656646A CN 114284705 A CN114284705 A CN 114284705A
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Abstract
The invention discloses a bottom dielectric substrate of a three-frequency three-feed antenna in satellite communication; the radio frequency ground is arranged on the lower surface of the bottom dielectric substrate; the first feed network comprises four output ends and is respectively connected with the four first spiral arms; and the second feed network comprises four output ends and is respectively connected with the four second spiral arms. On the premise of close transceiving frequency and compact structure, the mutual coupling of the transceiving antennas is adjusted by the low-frequency and high-frequency layout of the first antenna and the four-arm spiral antenna of the inner second antenna, and the low elevation angle performance of the satellite communication antenna is ensured; the interference of the third antenna on the satellite transceiving antenna is inhibited by adding the LC parallel resonance circuit to the third antenna; a single-layer plate and low-cost feed form is adopted, so that the process complexity is reduced, and the cost is saved; the radio frequency ground plane is complete, and the integration of radio frequency active/passive devices is facilitated.
Description
Technical Field
The invention relates to the technical field of satellite communication, in particular to a three-frequency three-feed antenna in satellite communication.
Background
With the development of satellite communication, the requirements of terminal antennas on low elevation angle performance, integration level, cost, polarization and the like are increasingly increased.
The traditional circularly polarized three-frequency three-feed antenna is a three-laminated microstrip antenna. Each layer of the three-layer microstrip antenna corresponds to one working frequency band.
The existing three-laminated microstrip antenna has the following defects:
1. due to the narrow beam width of the microstrip antenna, the gain at the low elevation angle is low.
2. In the improvement of the antenna adaptive to miniaturization, the three-layer-stacked microstrip antenna is mostly made of a ceramic substrate, and if the three-layer-stacked microstrip antenna is seen from the perspective of processing a multilayer board and a substrate, the production cost is higher.
Disclosure of Invention
The invention aims to solve the technical problem that the gain at a low elevation angle is low due to the narrow beam width of the microstrip antenna; in the improvement of the antenna adapting to miniaturization, the three-layer-stacked microstrip antenna is mostly made of a ceramic substrate, and if the multilayer board is processed and the substrate is viewed, the production cost is higher; the three-frequency three-feed antenna in satellite communication is provided to solve the problems of high processing cost and low gain in a low elevation angle state.
The invention is realized by the following technical scheme:
a triple-band triple-feed antenna in satellite communication, comprising:
a bottom dielectric substrate;
the radio frequency ground is arranged on the lower surface of the bottom dielectric substrate;
the antenna comprises a first antenna, a second antenna and a third antenna, wherein the first antenna is a low-frequency receiving frequency band antenna and comprises four first spiral arms, antenna media are arranged among the four first spiral arms to form a cylindrical whole, the length of the first antenna is half of the working frequency of the antenna or 0.8-1.2 times of the wavelength of one medium, and the bottom of the first spiral arm is connected to a radio frequency ground through a capacitor;
the second antenna is a high-frequency transmitting frequency band antenna and comprises four second spiral arms, the four second spiral arms form a cylindrical whole through an antenna medium, the length of the second antenna is half of the working frequency of the antenna or 0.8-1.2 times of the wavelength of one medium, and the second antenna is arranged on the periphery of the first antenna;
the third antenna is a loop antenna, the total length of the loop antenna is 0.8-1.2 times of one medium wavelength of the working frequency of the antenna, one end of the third antenna is provided with a feed point, and the other end, which is 0.8-1.2 times of the half medium wavelength of the feed point, of the third antenna is provided with an LC resonance circuit;
the first feed network comprises four output ends and is respectively connected with the four first spiral arms;
and the second feed network comprises four output ends and is respectively connected with the four second spiral arms.
By adopting the technical scheme, the positioning antenna comprises a first antenna, a second antenna and a third antenna, and the first antenna is connected into a first feed network, the second antenna is connected into a second feed network, and the third antenna is used as the positioning antenna correspondingly. As described above, the specific structural forms and layout forms of the first antenna, the second antenna and the third antenna adjust the mutual coupling of the receiving and transmitting antennas by the layout of the low frequency of the inner ring and the high frequency of the outer ring and by the different working modes of the first spiral arm and the second spiral arm which are four in number and are arranged on the inner ring and the outer ring, so that the low elevation angle performance of the satellite communication antenna is ensured, and the gain is improved.
Meanwhile, the single-layer bottom dielectric substrate is adopted, so that the material cost and the processing cost are lower.
The upper ends of the four first spiral arms are connected into a whole through a first coil. The radiation performance is optimized by providing the first coil.
The upper ends of the four second spiral arms are connected into a whole through a second coil. The radiation performance is optimized by providing a second coil.
In some embodiments, the dielectric constant of the bottom dielectric substrate is 2-6 and the thickness is 0.2mm-2 mm. The dielectric constant of the bottom dielectric substrate is defined so as to generate better antenna signals.
In some embodiments, the first antenna has a rising angle of 55 ° -65 ° and a radius of 8mm-13mm, and the impedance input to each port of the first spiral arm is designed to be in a range of 25ohm-100 ohm.
The range of the rising angle, the radius and the impedance of the first antenna is limited, so that better use effect is achieved.
In some embodiments, the second antenna has a rising angle of 43 ° -52 ° and a radius of 15mm-22mm, and the input impedance of each port of the second helical arm is designed to be in a range of 25ohm-100 ohm.
The rising angle, the radius and the impedance of the second antenna are limited in range, so that better use effect is achieved.
In some embodiments, the second feed network is a series feed network in a microstrip form, the second feed network sequentially has four microstrip traces from an input end, and a phase shift amount of each microstrip trace is 90 °, and a characteristic impedance of each microstrip trace is 23ohm-27ohm, 14ohm-18ohm, 23ohm-27ohm, and 45ohm-55ohm in sequence.
The second feed network 700 can effectively utilize space while replacing chips, saving cost.
In some embodiments, the dielectric constant of the antenna medium disposed between the first and second helical arms is 2.3-3.5 and the thickness is 0.1mm-0.5 mm.
In some embodiments, the bottom dielectric substrate has dimensions of no more than 50mm by 50mm and an operating frequency of 1GHz to 2 GHz.
In some embodiments, a first metal via is disposed on the third antenna, the first metal via penetrates through the bottom dielectric substrate, and is electrically connected to the rf ground, and the first metal via is close to the feeding point.
Through setting up first metal via hole to realize switching on of antenna signal circuit, and then in time access radio frequency ground.
In some embodiments, a second metal via is disposed on the third antenna, and the second metal via passes through the bottom dielectric substrate and is electrically connected to the rf ground.
In some embodiments, the second metal via is proximate to the LC resonant circuit, and the LC resonant circuit is connected in parallel to the radio frequency ground through the second metal via.
And the second metal via hole is arranged so as to help the LC resonant circuit to be connected in parallel.
Compared with the prior art, the invention has the following advantages and beneficial effects:
on the premise of close transceiving frequency and compact structure, the low elevation angle performance of the satellite communication antenna is ensured by the arrangement of the low frequency of the inner ring and the high frequency of the outer ring, the narrow-band radiation characteristic of the working mode of the inner ring and the outer ring, and the mutual coupling of the transceiving antennas by adjusting the structure, the radiation characteristic and the distance between the first antenna and the second antenna;
the interference of the third antenna on the satellite transceiving antenna is inhibited by adding the LC parallel resonance circuit to the third antenna;
a single-layer plate and low-cost feed form is adopted, so that the process complexity is reduced, and the cost is saved;
the radio frequency ground plane is complete, and the integration of radio frequency active/passive devices is facilitated.
Drawings
In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and that for those skilled in the art, other related drawings can be obtained from these drawings without inventive effort. In the drawings:
FIG. 1 is a schematic front view of an embodiment of the present invention;
FIG. 2 is a schematic top view of an embodiment of the present invention;
fig. 3 is a first antenna radiation pattern according to the invention;
FIG. 4 is a schematic view of a first antenna axis ratio of the present invention;
fig. 5 is a second antenna radiation pattern of the present invention;
FIG. 6 is a schematic diagram of a second antenna axial ratio according to the present invention;
fig. 7 is a third antenna radiation pattern according to the invention.
Reference numbers and corresponding part names in the drawings:
the antenna comprises a bottom dielectric substrate-100, a radio frequency ground-200, a first antenna-300, a first spiral arm-310, a first coil-320, a second antenna-400, a second spiral arm-410, a second coil-420, a third antenna-500, a feed point-510, an LC resonant circuit-520, a first metal via-530, a second metal via-540, a first feed network-600, a first feed point-610, a second feed network-700 and a second feed point-710.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
Example one
As shown in fig. 1 and 2, a triple-band triple-feed antenna for satellite communication includes: a bottom dielectric substrate 100, a radio frequency ground 200, a first antenna 300, a second antenna 400, a third antenna 500, a first feed network 600, and a second feed network 700.
The bottom dielectric substrate 100 is used to support the first antenna 300, the second antenna 400, and the third antenna 500. Based on the function of the dielectric substrate in the antenna technology, in this embodiment, the dielectric constant of the bottom dielectric substrate is 2, and the thickness is 0.2 mm.
The bottom dielectric substrate 100 has dimensions of 40mm by 40mm and operating frequency points of 1GHz, 1.2GHz, and 1.9 GHz.
The first antenna 300, the second antenna 400, and the third antenna 500 are all L-band antennas.
The first antenna 300 is a low frequency receive band antenna. The first antenna 300 includes four first helical arms 310, and the four first helical arms 310 are integrally formed in a cylindrical shape by disposing an antenna medium therebetween.
The length of the first antenna 300 is half of the operating frequency of the antenna or 0.8-1.2 times of the wavelength of one medium, and the bottom of the first spiral arm 310 is connected to the radio frequency ground through the capacitor 800.
As shown in fig. 2, a first feeding point 610 of the first feeding network 600.
In this embodiment, the first spiral arm 310 has a straight structure with the same width in the upper and lower directions.
The lower ends of the four first spiral arms 310 are connected as feeding points to the first feeding network 600.
The first feed network 600 may be a low cost solution using a 90 ° delay line in the form of a grounded coplanar waveguide and three 90 ° bridges or may be a solution using a four phase chip or the like.
The four output terminals of the first feed network 14 are connected to the bottom of each first spiral arm 310 in turn, i.e. when the input terminals of the first feed network 600 are excited, so as to provide each first spiral arm 310 with excitation signals having equal amplitude and sequentially different phases by 90 °.
The first antenna 300 has a rising angle of 55 ° and a radius of 8mm, and the impedance of the input of each port of the first spiral arm 310 is designed to be 25 ohm.
The upper ends of the four first spiral arms 310 are integrally connected by the first coil 320.
The second antenna 400 is a high-frequency transmission band antenna, the second antenna 400 includes four second spiral arms 410, the four second spiral arms 410 form a cylindrical whole through an antenna medium, the length of the second antenna 400 is half of the working frequency of the antenna or 0.8-1.2 times of the wavelength of one medium, and the second antenna 400 is disposed on the periphery of the first antenna 300.
The dielectric constant of the antenna medium disposed between the first spiral arm 310 and the second spiral arm 410 is 2.3 and the thickness is 0.1.
The upper ends of the four second spiral arms 410 are integrally connected by the second coil 420.
The second antenna 400 has a rise angle of 43 ° and a radius of 15mm, and the input impedance of each port of the second spiral arm 410 is designed to be 25 ohm.
A second feeding network 700, wherein the second feeding network 700 comprises four output terminals, and is respectively connected to the four second spiral arms 410.
As shown in fig. 2, a second feeding point 710 of the second feeding network 700.
The second feed network 700 is a microstrip series feed network, and the second feed network 700 has four sections of microstrip lines in sequence from the input end, and the phase shift amount of each section of microstrip line is 90 °. In a specific implementation, the characteristic impedance of each microstrip trace needs to be adaptively determined according to the input impedance of the second spiral arm.
The second feed network 700 can effectively utilize space while replacing chips, saving cost.
The third antenna 500, the third antenna 500 is a loop antenna, as shown in fig. 2, the third antenna 500 is specifically a long loop, and the total length of the loop antenna is 0.8-1.2 times of one dielectric wavelength of the antenna operating frequency, one end of the third antenna 500 is provided with a feeding point 510, and the other end of the third antenna 500, which is 0.8-1.2 times of the half dielectric wavelength from the feeding point 510, is provided with an LC resonant circuit 520. The loop antenna is located on the upper surface of the bottom dielectric substrate 100, and the rf ground of the lower surface does not have a copper metal sheet (the same in the following embodiments).
The third antenna 500 is provided with a first metal via 530, the first metal via 530 penetrates through the bottom dielectric substrate 100, and the circuit is conducted to the rf ground 200, and the first metal via 530 is close to the feeding point 510.
The third antenna 500 is provided with a second metal via 540, the second metal via 540 passes through the bottom dielectric substrate 100 and is electrically connected to the rf ground 200, the second metal via 540 is close to the LC resonant circuit 520, and the LC resonant circuit 520 is connected to the rf ground 200 in parallel through the second metal via 540.
Example two
As shown in fig. 1 and 2, the bottom dielectric substrate 100 in the present embodiment is used to support the first antenna 300, the second antenna 400, and the third antenna 500. Based on the function of the dielectric substrate in the antenna technology, in this embodiment, the dielectric constant of the bottom dielectric substrate is 6, and the thickness is 2 mm.
The bottom dielectric substrate 100 has dimensions of 50mm x 50mm and operating frequency points of 1.2GHz, 1.3GHz, and 1.5 GHz.
The first antenna 300, the second antenna 400, and the third antenna 500 are all L-band antennas.
The first antenna 300 is a low frequency receive band antenna. The first antenna 300 includes four first helical arms 310, and the four first helical arms 310 are integrally formed in a cylindrical shape by disposing an antenna medium therebetween.
The length of the first antenna 300 is half of the antenna operating frequency or 0.8-1.2 times of one medium wavelength, and the bottom of the first spiral arm is connected to the radio frequency ground through the capacitor 800.
In the present embodiment, the first spiral arm 310 has a structure gradually changing from top to bottom.
As shown in fig. 2, a first feed point 610 of the first feed network 600, a second feed point 710 of the second feed network 700.
The lower ends of the four first spiral arms 310 are connected as feeding points to the first feeding network 600.
The first feed network 600 employs a low cost solution of a 90 delay line in the form of a grounded coplanar waveguide and three 90 bridges.
The four output terminals of the first feed network 14 are connected to the bottom of each first spiral arm 310 in turn, i.e. when the input terminals of the first feed network 600 are excited, so as to provide each first spiral arm 310 with excitation signals having equal amplitude and sequentially different phases by 90 °.
The first antenna 300 has a rise angle of 65 ° and a radius of 13mm, and the input impedance of each port of the first spiral arm 310 is designed to be 100 ohm.
The upper ends of the four first spiral arms 310 are integrally connected by the first coil 320.
The second antenna 400 is a high-frequency transmission band antenna, the second antenna 400 includes four second spiral arms 410, the four second spiral arms 410 form a cylindrical whole through an antenna medium, the length of the second antenna 400 is half of the working frequency of the antenna or 0.8-1.2 times of the wavelength of one medium, and the second antenna 400 is disposed on the periphery of the first antenna 300.
The dielectric constant of the antenna medium disposed between the first spiral arm and the second spiral arm 410 is 3.5 and the thickness is 0.5 mm.
The upper ends of the four second spiral arms 410 are integrally connected by the second coil 420.
The bottom substrate can be a multilayer board, and the selectable schemes of the first feed network and the second feed network comprise a four-phase feed network constructed by LC, a four-phase chip, a feed network composed of a 90-degree electric bridge and a phase delay line, a feed network composed of a differential balun and a 90-degree electric bridge, and the like.
The second antenna 400 has a rising angle of 52 ° and a radius of 22mm, and the input impedance of each port of the second spiral arm 410 is designed to be 100 ohms.
A second feeding network 700, wherein the second feeding network 700 comprises four output terminals, and is respectively connected to the four second spiral arms 410.
The second feed network 700 is a series feed network in a microstrip form, the second feed network 700 has four sections of microstrip traces in sequence from the input end, and the phase shift amount of each section of microstrip trace is 90 °, in specific implementation, the characteristic impedance of each section of microstrip trace needs to be determined according to the input impedance of the second spiral arm, and the adaptability is determined.
The third antenna 500, the third antenna 500 is a loop antenna.
As shown in fig. 2, the third antenna 500 is specifically in the shape of a long loop, and the total length of the loop antenna is 0.8-1.2 times of one dielectric wavelength of the antenna operating frequency, a feeding point 510 is disposed at one end of the third antenna 500, and an LC resonant circuit 520 is disposed at the other end of the third antenna 500, which is 0.8-1.2 times of the half dielectric wavelength from the feeding point 510, and the resonant frequency of the LC resonant circuit 520 is close to the operating frequency of the third antenna 500.
The third antenna 500 is provided with a first metal via 530, the first metal via 530 penetrates through the bottom dielectric substrate 100, and the circuit is conducted to the rf ground 200, and the first metal via 530 is close to the feeding point 510. A second metal via 540 is disposed on the third antenna 500, the second metal via 540 passes through the bottom dielectric substrate 100, and the circuit is conducted to the rf ground 200, and the second metal via 540 is close to the LC resonant circuit 520.
The above first metal via 530 and second metal via 540 are both used to realize the circuit conduction of the part of the third antenna 500 and the rf ground 200.
As shown in fig. 2, a first feed point 610 of the first feed network 600, a second feed point 710 of the second feed network 700.
EXAMPLE III
As shown in fig. 1 and 2, the bottom dielectric substrate 100 in the present embodiment is used to support the first antenna 300, the second antenna 400, and the third antenna 500. Based on the function of the dielectric substrate in the antenna technology, in this embodiment, the dielectric constant of the bottom dielectric substrate is 4.4, and the thickness is 0.4 mm.
The bottom dielectric substrate 100 has dimensions of 50mm x 50mm and operating frequency points of 1.5GHz, 1.8GHz, and 1.9 GHz.
The first antenna 300, the second antenna 400, and the third antenna 500 are all L-band antennas.
The first antenna 300 is a low frequency receive band antenna. The first antenna 300 includes four first helical arms 310, and the four first helical arms 310 are integrally formed in a cylindrical shape by disposing an antenna medium therebetween.
The length of the first antenna 300 is one medium wavelength of the antenna operating frequency.
The lower ends of the four first spiral arms 310 are connected as feeding points to the first feeding network 600.
In the present embodiment, the first spiral arm 310 has a structure with a gradually changing top width and bottom width.
The first feed network 600 employs a low cost solution of a 90 delay line in the form of a grounded coplanar waveguide and three 90 bridges.
The four output terminals of the first feed network 14 are connected to the bottom of each first spiral arm 310 in turn, i.e. when the input terminals of the first feed network 600 are excited, so as to provide each first spiral arm 310 with excitation signals having equal amplitude and sequentially different phases by 90 °.
The first antenna 300 has a 60 deg. rise angle and a radius of 18mm, and the impedance design range of the first helical arm 310 is 50 hm.
The upper ends of the four first spiral arms 310 are integrally connected by the first coil 320.
The second antenna 400 is a high-frequency transmission band antenna, the second antenna 400 includes four second spiral arms 410, the four second spiral arms 410 form a cylindrical whole through an antenna medium, the length of the second antenna 400 is half of the working frequency of the antenna or 0.8-1.2 times of the wavelength of one medium, and the second antenna 400 is disposed on the periphery of the first antenna 300.
The dielectric constant of the antenna medium disposed between the second spiral arms 410 is 2.55 and the thickness is 0.127 mm.
The upper ends of the four second spiral arms 410 are integrally connected by the second coil 420.
The bottom substrate can be a multilayer board, and the selectable schemes of the first feed network and the second feed network comprise a four-phase feed network constructed by LC, a four-phase chip, a feed network composed of a 90-degree electric bridge and a phase delay line, a feed network composed of a differential balun and a 90-degree electric bridge, and the like.
The second antenna 400 has a rising angle of 48 ° and a radius of 18m, and the impedance at each port of the first spiral arm 310 is designed to be 50 ohm.
A second feeding network 700, wherein the second feeding network 700 comprises four output terminals, and is respectively connected to the four second spiral arms 410.
The second feed network 700 is a series feed network in a microstrip form, the second feed network 700 has four microstrip traces in sequence from the input end, the phase shift amount of each microstrip trace is 90 °, and the characteristic impedance of each microstrip trace is 25ohm, 16.7ohm, 25ohm and 50ohm in sequence.
The third antenna 500, the third antenna 500 is a loop antenna.
As shown in fig. 2, the third antenna 500 is specifically in the shape of a long loop, and the total length of the loop antenna is one dielectric wavelength of the operating frequency of the antenna, one end of the third antenna 500 is provided with a feeding point 510, and the other end of the third antenna 500, which is 0.8-1.2 times of the half dielectric wavelength from the feeding point 510, is provided with an LC resonant circuit 520.
The third antenna 500 is provided with a first metal via 530, the first metal via 530 penetrates through the bottom dielectric substrate 100, and the circuit is conducted to the rf ground 200, and the first metal via 530 is close to the feeding point 510. The third antenna 500 is provided with a second metal via 540, the second metal via 540 passes through the bottom dielectric substrate 100 and is electrically connected to the rf ground 200, the second metal via 540 is close to the LC resonant circuit 520, and the LC resonant circuit 520 is connected to the rf ground 200 in parallel through the second metal via 540.
The above first metal via 530 and second metal via 540 are both used to realize the circuit conduction of the part of the third antenna 500 and the rf ground 200.
The third antenna in the above embodiments may be used as a positioning antenna of an end product in specific use.
The above embodiments achieve the overall functions and functions through the combination of the first antenna 200, the second antenna 400 and the third antenna 500, and the adaptation of the relevant parameters, and the efficacy of each antenna is illustrated as shown in fig. 3 to 7.
As shown in fig. 2, a first feed point 610 of the first feed network 600, a second feed point 710 of the second feed network 700.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A three-frequency three-feed antenna in satellite communication is characterized by comprising:
a bottom dielectric substrate;
the radio frequency ground is arranged on the bottom dielectric substrate;
the antenna comprises a first antenna, a second antenna and a third antenna, wherein the first antenna is a low-frequency receiving frequency band antenna and comprises a first spiral arm, the length of the first antenna is half of the working frequency of the antenna or 0.8-1.2 times of the wavelength of one medium, and the bottom of the first spiral arm is connected to a radio-frequency ground through a capacitor;
the second antenna is a high-frequency transmitting frequency band antenna and comprises a second spiral arm, the length of the second antenna is half of the working frequency of the antenna or 0.8-1.2 times of the wavelength of one medium, and the second antenna is arranged on the periphery of the first antenna;
the third antenna is a loop antenna, the total length of the loop antenna is 0.8-1.2 times of one medium wavelength of the working frequency of the antenna, one end of the third antenna is provided with a feed point, and the other end, which is 0.8-1.2 times of the half medium wavelength of the feed point, of the third antenna is provided with an LC resonance circuit;
the first feed network comprises output ends and is respectively connected to the first spiral arms;
the second feed network comprises output ends and is respectively connected to the second spiral arms;
the upper ends of the four first spiral arms are connected into a whole through a first coil;
the upper ends of the four second spiral arms are connected into a whole through a second coil.
2. The triple-band triple-feed antenna in satellite communication according to claim 1, wherein the dielectric constant of the bottom dielectric substrate is 2-6, and the thickness is 0.2mm-2 mm.
3. The triple-feed antenna in satellite communication according to claim 1, wherein the first antenna has a rising angle of 55 ° -65 ° and a radius of 8mm-13mm, and the input impedance of each port of the first spiral arm is designed to be 25-100 ohm.
4. The triple-feed antenna in satellite communication according to claim 1, wherein the second antenna has a rising angle of 43 ° -52 ° and a radius of 15mm-22mm, and an input impedance design range of 25ohm-100hm for each port of the second spiral arm.
5. The triple-band triple-feed antenna in satellite communication according to claim 1, wherein the second feed network is a series feed network in a microstrip form, the second feed network has four microstrip traces in sequence from an input end, and a phase shift amount of each microstrip trace is 90 °.
6. The triple-band triple-feed antenna in satellite communication according to claim 1, wherein a dielectric constant of an antenna medium disposed between the first spiral arm and the second spiral arm is 2.3-3.5 mm and a thickness thereof is 0.1mm-0.5 mm.
7. The triple-band triple-feed antenna in satellite communication according to claim 1, wherein the size of the bottom dielectric substrate is not more than 50mm x 50mm, and the working frequency point is 1GHz-2 GHz.
8. The triple-band triple-feed antenna in satellite communication according to claim 1, wherein a first metal via is disposed on the third antenna, the first metal via penetrates through the bottom dielectric substrate, and is electrically connected to the radio frequency ground, and the first metal via is close to the feeding point.
9. The triple-band triple-feed antenna in satellite communication according to claim 1, wherein a second metal via is disposed on the third antenna, and the second metal via passes through the bottom dielectric substrate and is electrically connected to the rf ground.
10. The triple-band triple-feed antenna in satellite communication according to claim 9, wherein the second metal via is close to the LC resonant circuit, and the LC resonant circuit is connected in parallel to the rf ground through the second metal via.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020069397A (en) * | 2001-02-26 | 2002-09-04 | (주)이.엠.더블유 안테나 | Multiple bands type antenna Antenna and method for produeing the same |
| US20110001680A1 (en) * | 2009-05-05 | 2011-01-06 | Sarantel Limited | Multifilar Antenna |
| CN204668458U (en) * | 2015-04-08 | 2015-09-23 | 西安星网天线技术有限公司 | Three frequency spiral antenna with circular polarizations |
| CN107611590A (en) * | 2017-10-16 | 2018-01-19 | 福建福大北斗通信科技有限公司 | Compact dual-frequency satellite communication hand-held terminal antenna and its application method |
| CN111342225A (en) * | 2020-03-19 | 2020-06-26 | 上海旦迪通信技术有限公司 | Miniaturized three-frequency circuit loading helical antenna |
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2021
- 2021-12-30 CN CN202111656646.1A patent/CN114284705B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020069397A (en) * | 2001-02-26 | 2002-09-04 | (주)이.엠.더블유 안테나 | Multiple bands type antenna Antenna and method for produeing the same |
| US20110001680A1 (en) * | 2009-05-05 | 2011-01-06 | Sarantel Limited | Multifilar Antenna |
| CN204668458U (en) * | 2015-04-08 | 2015-09-23 | 西安星网天线技术有限公司 | Three frequency spiral antenna with circular polarizations |
| CN107611590A (en) * | 2017-10-16 | 2018-01-19 | 福建福大北斗通信科技有限公司 | Compact dual-frequency satellite communication hand-held terminal antenna and its application method |
| CN111342225A (en) * | 2020-03-19 | 2020-06-26 | 上海旦迪通信技术有限公司 | Miniaturized three-frequency circuit loading helical antenna |
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| CN114284705B (en) | 2024-04-16 |
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