CN103840268A - Broadband wide beam circular polarization quadrifilar helix antenna - Google Patents
Broadband wide beam circular polarization quadrifilar helix antenna Download PDFInfo
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- CN103840268A CN103840268A CN201410117350.6A CN201410117350A CN103840268A CN 103840268 A CN103840268 A CN 103840268A CN 201410117350 A CN201410117350 A CN 201410117350A CN 103840268 A CN103840268 A CN 103840268A
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Abstract
The invention discloses a broadband wide beam circular polarization quadrifilar helix antenna which comprises a main radiation body and a feed network. The main radiation body is composed of four spiral arms printed on a flexible medium plate; each spiral arm is composed of a main arm body and a parasitic arm body, and the top of the main arm body of each spiral arm and the top of the parasitic arm body of each spiral arm are connected through a metal sheet; each main arm body is composed of a top metal sheet, a middle metal sheet and a bottom metal sheet which are connected in sequence; the width of the bottom metal sheets and the width of the top metal sheets are equal and are wider than that of the middle metal sheets. The broadband wide beam circular polarization quadrifilar helix antenna is flexible in design, capable of achieving higher gain in a broadband range, good in circular polarization performance, compact in structure, low in weight, easy to process and very suitable for serving as a portable terminal in the field of communications or navigation.
Description
Technical field
A kind of broadband and wide wave beam circular polarization four-arm spiral antenna that the present invention relates to communication and navigation field, is particularly suitable for the design of the high-performance portable antenna of mobile satellite communication and navigation field.
Background technology
Because four-arm spiral antenna has wider beamwidth, the good advantage such as front and back ratio, good wide angle circular polarization performance, be applicable to being very much applied to satellite communication and navigation field.But communication and navigation antenna require double frequency or multiple-frequency operation conventionally, and common four-arm spiral antenna is resonant antenna, and bandwidth is narrower, and therefore its range of application is comparatively limited.2006, the Yoann Letestu Broadband Folded Printed Quadrifilar Helical Antenna that publishes an article on IEEE Transactions on Antennas and Propagation, propose to add the design of parasitic arm on four-arm spiral antenna, can be by its broadened bandwidth to 30%.Its structural representation as shown in Figure 1, but defect is both ways deposited in the design of Yoann Letestu: the one, and the working band of antenna and its diameter, height and closely bound up around number of turns etc., only, under some special construction, antenna just has wider working band; The 2nd, principal arm is connected by a bit of connecting line with parasitic arm, this connecting line carefully to a certain extent, antenna just has good standing wave, in the working frequency range of 1.2GHz-1.6GHz, the width of connecting line is only 0.5mm, if operating frequency raises, connecting line may meticulously cause processing technology to be difficult to realize, or is in use easy to fracture.
Although the broadband four-arm spiral antenna that Yoann Letestu proposes has above shortcoming, be still suitable as very much the wide frequency band wave beam portable terminal device of communication and navigation field.But four input ports of four-arm spiral antenna needs (0 °, 90 °, 180 °, 270 °) feed, common feeding network area occupied is large, is therefore difficult to realize portable design.The people such as the Mathieu Caillet A Broadband Folded Printed Quadrifilar Helical Antenna Employing a Novel Compact Planar Feeding Circuit that published an article on IEEE Transactions on Antennas and Propagation in 2010, the miniaturization feeding network method for designing of four-arm spiral antenna has been proposed, adopt the method for hole slot coupling to realize 180 ° of phase shifts, adopt 90 ° of hybrid couplers of anaren company to realize 90 ° of phase shifts.This feeding network makes broadband four-arm spiral antenna become possibility in the application of portable terminal device, but also deposits defect both ways: the one, increase production cost; The 2nd, be difficult to realize the integrated design of feeding network and antenna.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of low cost high-gain broadband broad beam circular polarization four-arm spiral antenna, is applicable to satellite and navigation portable terminal device, can in broad frequency range, realize higher gain, and circular polarization performance is good.
For solving the problems of the technologies described above, the technical solution used in the present invention is:
A kind of broadband and wide wave beam circular polarization four-arm spiral antenna, comprises radiating principal and feeding network; Described radiating principal is made up of four spiral arm that are printed on flexible media plate; Each spiral arm is by a principal arm and a parasitic arm composition, and in each spiral arm, principal arm is connected by sheet metal with the top of parasitic arm; Each principal arm is by the top metal piece connecting successively, middle part sheet metal and bottom metal sheet composition; Wherein, the width of bottom metal sheet and top metal piece is identical and all wide than middle part sheet metal.
Wherein, the ratio of the width of the width of described top metal piece and middle part sheet metal is greater than 8.
Wherein, described feeding network comprises top dielectric plate and layer dielectric plate; The end face of top dielectric plate is provided with the first microband paste layer, and the bottom surface of top dielectric plate is provided with flaggy medially; The bottom surface of layer dielectric plate is provided with the second microband paste layer; Described the second microband paste layer is provided with the second center microstrip line and upper and lower two 90 ° of power splitters; Upper and lower two 90 ° of power splitters are with respect to the Central Symmetry setting of the second microband paste layer; 90 ° of power splitters are L shaped ring-type microstrip line, and the long handle portion of L shaped ring-type microstrip line is horizontally disposed with; The second center microstrip line comprises the second vertical microstrip line at the second microband paste layer center that be located at, the top of the second vertical microstrip line is provided with the upper extension microstrip line that tilts to extend to upper left side, the low side of the second vertical microstrip line is provided with the lower extension microstrip line extending to lower right, and upper and lower two extension microstrip lines are connected with upper and lower two L shaped ring-type microstrip lines respectively.
Wherein, described the first microband paste layer is provided with the first center microstrip line and four L-type microstrip lines that are positioned at the first center microstrip line periphery; Wherein, two L-type microstrip lines of left and right are with respect to the Central Symmetry setting of the first microband paste layer, and two short handle levels of two L-type microstrip lines of left and right and termination are oppositely arranged; Two upper and lower L-type microstrip lines are with respect to the Central Symmetry setting of the first microband paste layer, and two long handles of two upper and lower L-type microstrip lines are vertical and termination is oppositely arranged; The first center microstrip line comprises the first vertical microstrip line at the first microband paste layer center that be located at, the top of the first vertical microstrip line is provided with successively the level connecting extend to upper left microstrip line, microstrip line and the level microstrip line that extends to left down that extends straight down towards left L-type microstrip line, and the low side of the first vertical microstrip line is provided with the level microstrip line that extends to the right towards right L-type microstrip line; The center of flaggy is provided with coupling gap medially; Coupling gap comprises H shape coupling slot, and two terminations of H shape coupling slot upper end relative two levels seam that extends that is provided with respectively, also relative two levels seam that extends that is provided with respectively of two terminations of H shape coupling slot lower end; The second microband paste layer is provided with yi word pattern microstrip line; Yi word pattern microstrip line is horizontally set on the left side of the second vertical microstrip line; Center, the coupling center in gap and the center of the second vertical microstrip line of the first vertical microstrip line are all on same vertical direction.
Wherein, the short handle portion of upper L shaped ring-type microstrip line straight down and be located at the left side of its long handle portion, the short handle portion of lower L shaped ring-type microstrip line straight up and be located at the right side of its long handle portion; The left side, termination of the short handle portion of upper L shaped ring-type microstrip line and the middle part upside of its long handle portion are respectively equipped with first time output port and second time output port, and the right side, termination of the short handle portion of lower L shaped ring-type microstrip line and the middle part downside of its long handle portion are respectively equipped with the 3rd time output port and the 4th time output port; The short handle portion level of upper L-type microstrip line arranges and is located at the top of its long handle portion left, the short handle portion level of lower L-type microstrip line arranges and is located at the bottom of its long handle portion to the right, the long handle portion of left L-type microstrip line arranges and is located at the left end of its short handle portion straight up, and the long handle portion of right L-type microstrip line arranges and be located at the right-hand member of its short handle portion straight down; The termination of the long handle portion of left L-type microstrip line is provided with input port on first, the termination of the short handle portion of upper L-type microstrip line is provided with input port on second, the termination of the long handle portion of right L-type microstrip line is provided with input port on the 3rd, and the termination of the short handle portion of lower L-type microstrip line is provided with input port on the 4th; First to fourth time output port and input port on first to fourth adopt respectively vertical being connected through corresponding circular gap on flaggy medially of probe one to one; The left end of yi word pattern microstrip line is provided with lower input port, and the port of the right-hand member of yi word pattern microstrip line is by vertical being connected through extend the to left down port of microstrip line left end of corresponding circular gap on flaggy medially and the level of the first center microstrip line of probe; The termination of the termination of the termination of the termination of the short handle portion of left L-type microstrip line, the long handle portion of lower L-type microstrip line, the short handle portion of right L-type microstrip line and the long handle portion of upper L-type microstrip line is respectively equipped with output port on first to fourth; On first to fourth output port respectively with the corresponding welding one by one of four bottom metal sheets.
Wherein, the circular gap on described flaggy medially forms coaxial configuration with the probe through gap respectively; The termination of the long handle portion of upper and lower two L shaped ring-type microstrip lines is respectively provided with a coupling port, and each coupling port is respectively equipped with the resistance of one 50 ohm.
The beneficial effect that adopts technique scheme to produce is:
Radiating principal of the present invention, by the narrowed width of interlude on principal arm is changed to its CURRENT DISTRIBUTION, regulates input impedance, realizes the flexibility of Antenna Design.Feeding network is realized 180 ° of phase shifts by the method for hole slot coupling, realizes 90 ° of phase shifts by 90 ° of electric bridges, thereby realizes four ports (0 °, 90 °, 180 °, 270 °) feed.Flexible design of the present invention can be realized higher gain in broad frequency range, and circular polarization performance is good, and compact conformation is lightweight, easily processes, and is suitable as very much the portable terminal device of communication or navigation field.
The present invention with respect to advantage and the effect of background technology is:
1. in the situation that background technology can not realize broadband operation, design of the present invention still can have good standing wave performance in broadband.
2. the present invention prints 90 ° of electric bridges of miniaturization on dielectric-slab, and background technology need buy 90 ° of hybrid couplers and realize 90 ° of phase shifts, and therefore cost of the present invention is lower.
3. the present invention can realize the integrated design of antenna and feeding network, therefore can improve antenna and feeding network matching performance.
Accompanying drawing explanation
Fig. 1 is the structural representation of radiating principal in prior art;
Fig. 2 is structural representation of the present invention;
Fig. 3 is the structural representation of feeding network the first microband paste layer of the present invention;
Fig. 4 is the structural representation of feeding network the second microband paste layer of the present invention;
Fig. 5 is the feeding network of the present invention structural representation of flaggy medially;
Fig. 6 is the simulation curve of the gain contrast of the present invention and prior art.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
As shown in Figure 2, the present invention is a kind of broadband and wide wave beam circular polarization four-arm spiral antenna, comprises radiating principal and feeding network; Wherein, radiating principal is made up of four spiral arm that are printed on flexible media plate 1-1; Each spiral arm is by a principal arm 1-2 and a parasitic arm 1-3 composition, and in each spiral arm, principal arm is connected by sheet metal with the top of parasitic arm; Parasitic arm 1-3 is the long and thin metal sheet of bottom ground connection; Each principal arm 1-2 is by the top metal piece 1-2-1, the middle part sheet metal 1-2-2 that connect successively and bottom metal sheet 1-2-3 composition; Wherein, the width of bottom metal sheet 1-2-3 and top metal piece 1-2-1 is identical and all wide than middle part sheet metal 1-2-2, and the ratio of the width of the width of top metal piece 1-2-1 and middle part sheet metal 1-2-2 is greater than 8.Feeding network comprises top dielectric plate 3 and layer dielectric plate 5; The end face of top dielectric plate 3 is provided with the first microband paste layer 2, and the bottom surface of top dielectric plate 3 is provided with flaggy 4 medially; The end face of layer dielectric plate 5 erodes, and the bottom surface of layer dielectric plate 5 is provided with the second microband paste layer 6.
The dielectric constant of flexible media plate 1-1 is 2.2, and thickness is 0.127mm, and flexible media plate 1-1 is coiled into the cylindric structure that realizes four-arm spiral antenna.The top dielectric plate 3 of feeding network and layer dielectric plate 5 all adopt the dielectric-slab of high-k, to guarantee the Miniaturization Design of feeding network.
As shown in Figure 3, the first microband paste layer 2 of the present invention is provided with the first center microstrip line 2-2 and four L-type microstrip line 2-1 that are positioned at the first center microstrip line 2-2 periphery; Wherein, two L-type microstrip line 2-1 of left and right are with respect to the Central Symmetry setting of the first microband paste layer 2, and two short handle levels of two L-type microstrip line 2-1 of left and right and termination are oppositely arranged; Two upper and lower L-type microstrip line 2-1 are with respect to the Central Symmetry setting of the first microband paste layer 2, and two long handles of two upper and lower L-type microstrip line 2-1 are vertical and termination is oppositely arranged; The first center microstrip line 2-2 comprises the first vertical microstrip line at first microband paste layer 2 center that are located at, the top of the first vertical microstrip line is provided with successively the level connecting extend to upper left microstrip line, microstrip line and the level microstrip line that extends to left down that extends straight down towards left L-type microstrip line 2-1, and the low side of the first vertical microstrip line is provided with the level microstrip line that extends to the right towards right L-type microstrip line 2-1; The short handle portion level of upper L-type microstrip line 2-1 arranges and is located at the top of its long handle portion left, the short handle portion level of lower L-type microstrip line 2-1 arranges and is located at the bottom of its long handle portion to the right, the long handle portion of left L-type microstrip line 2-1 arranges and is located at the left end of its short handle portion straight up, and the long handle portion of right L-type microstrip line 2-1 arranges and be located at the right-hand member of its short handle portion straight down; The termination of the long handle portion of left L-type microstrip line 2-1 is provided with input port 2-3 on first, the termination of the short handle portion of upper L-type microstrip line 2-1 is provided with input port 2-4 on second, the termination of the long handle portion of right L-type microstrip line 2-1 is provided with input port 2-5 on the 3rd, and the termination of the short handle portion of lower L-type microstrip line 2-1 is provided with input port 2-6 on the 4th; The termination of the termination of the termination of the termination of the short handle portion of left L-type microstrip line 2-1, the long handle portion of lower L-type microstrip line 2-1, the short handle portion of right L-type microstrip line 2-1 and the long handle portion of upper L-type microstrip line 2-1 is respectively equipped with output port 2-7 to 2-10 on first to fourth; On first to fourth output port 2-7 to 2-10 respectively with four bottom metal sheet 1-2-3 corresponding welding one by one.
As shown in Figure 4, the center of flaggy medially 4 of the present invention is provided with coupling gap 4-1; Coupling gap 4-1 comprises H shape coupling slot, and two terminations of H shape coupling slot upper end relative two levels seam that extends that is provided with respectively, also relative two levels seam that extends that is provided with respectively of two terminations of H shape coupling slot lower end.
As shown in Figure 5, the second microband paste layer 6 of the present invention is provided with yi word pattern microstrip line 6-2, the second center microstrip line 6-3 and upper and lower two 90 ° of power splitter 6-1, and upper and lower two 90 ° of power splitter 6-1 are with respect to the Central Symmetry setting of the second microband paste layer 6; 90 ° of power splitter 6-1 are L shaped ring-type microstrip line, and the long handle portion of L shaped ring-type microstrip line is horizontally disposed with; The second center microstrip line 6-3 comprises the second vertical microstrip line at second microband paste layer 6 center that are located at, the top of the second vertical microstrip line is provided with the upper extension microstrip line that tilts to extend to upper left side, the low side of the second vertical microstrip line is provided with the lower extension microstrip line extending to lower right, and upper and lower two extension microstrip lines are connected with upper and lower two L shaped ring-type microstrip lines respectively; Yi word pattern microstrip line 6-2 is horizontally set on the left side of the second vertical microstrip line; The left end of yi word pattern microstrip line 6-2 is provided with lower input port 6-9, and the port of the right-hand member of yi word pattern microstrip line 6-2 is by vertical being connected through extend the to left down port 2-11 of microstrip line left end of corresponding circular gap 4-2 on flaggy 4 medially and the level of the first center microstrip line 2-2 of probe; Straight down and be located at the left side of its long handle portion, the short handle portion of lower L shaped ring-type microstrip line straight up and be located at the right side of its long handle portion in the short handle portion of upper L shaped ring-type microstrip line; The left side, termination of the short handle portion of upper L shaped ring-type microstrip line and the middle part upside of its long handle portion are respectively equipped with first time output port 6-4 and second time output port 6-5, and the right side, termination of the short handle portion of lower L shaped ring-type microstrip line and the middle part downside of its long handle portion are respectively equipped with the 3rd time output port 6-6 and the 4th time output port 6-7; First to fourth time output port 6-4 to 6-7 and input port 2-3 to 2-6 on first to fourth adopt respectively vertical being connected through corresponding circular gap 4-2 on flaggy 4 medially of probe one to one.Circular gap 4-2 on flaggy 4 forms coaxial configuration with the probe through gap respectively medially; The termination of the long handle portion of upper and lower two L shaped ring-type microstrip lines is respectively provided with a coupling port 6-8, and each coupling port 6-8 is respectively equipped with the resistance of one 50 ohm.
In Fig. 3 to Fig. 5, the center of the center of the first vertical microstrip line, coupling 4-1 center, gap and the second vertical microstrip line is all on same vertical direction.
The spiral arm of radiating principal of the present invention is made up of wider four principal arms and four narrower parasitic arms, and feeding network is made up of two layer medium plate.Four-arm spiral antenna is by adding parasitic arm to carry out broadening bandwidth of operation.First the present invention improves the structure of Yoann Letestu, by certain section of narrowed width in wide spiral arm, form one section of thinner spiral arm, make the antenna can be in broadband operation, and can be by regulating position and the size of thin spiral arm, further improve mating of antenna and feeding network, improve antenna gain.In addition, the present invention adopts a kind of 90 ° of L shaped electric bridges to replace 90 ° of hybrid couplers of Mathieu Caillet, except realizing Miniaturization Design, also has two aspect advantages: Shi Zhixu lower floor paster printing, has reduced cost; The 2nd, can adopt simulation software and antenna to carry out integrated design, improve the matching performance of antenna and feeding network, thereby improve gain.
Be illustrated in figure 6 in the situation that physical dimension is identical, the gain contrast simulation curve figure of prior art in the present invention and Fig. 1, in figure, solid line is the actual gain of prior art, dotted line is actual gain of the present invention.As seen from Figure 6, compared with prior art, actual gain of the present invention has improved 2dB nearly, this shows superiority of the present invention.
Claims (6)
1. a broadband and wide wave beam circular polarization four-arm spiral antenna, comprises radiating principal and feeding network; Described radiating principal is made up of four spiral arm that are printed on flexible media plate (1-1); Each spiral arm is by a principal arm (1-2) and a parasitic arm (1-3) composition, and principal arm in each spiral arm is connected by sheet metal with the top of parasitic arm; It is characterized in that: each principal arm (1-2) is by the top metal piece (1-2-1) connecting successively, middle part sheet metal (1-2-2) and bottom metal sheet (1-2-3) composition; Wherein, the width of bottom metal sheet (1-2-3) and top metal piece (1-2-1) is identical and all wide than middle part sheet metal (1-2-2).
2. a kind of broadband and wide wave beam circular polarization four-arm spiral antenna according to claim 1, is characterized in that: the ratio of the width of the width of described top metal piece (1-2-1) and middle part sheet metal (1-2-2) is greater than 8.
3. a kind of broadband and wide wave beam circular polarization four-arm spiral antenna according to claim 1, is characterized in that: described feeding network comprises top dielectric plate (3) and layer dielectric plate (5); The end face of top dielectric plate (3) is provided with the first microband paste layer (2), and the bottom surface of top dielectric plate (3) is provided with flaggy (4) medially; The bottom surface of layer dielectric plate (5) is provided with the second microband paste layer (6);
Described the second microband paste layer (6) is provided with the second center microstrip line (6-3) and upper and lower two 90 ° power splitters (6-1); Upper and lower two 90 ° power splitters (6-1) are with respect to the Central Symmetry setting of the second microband paste layer (6); 90 ° of power splitters (6-1) are L shaped ring-type microstrip line, and the long handle portion of L shaped ring-type microstrip line is horizontally disposed with; The second center microstrip line (6-3) comprises the second vertical microstrip line at second microband paste layer (6) center that is located at, the top of the second vertical microstrip line is provided with the upper extension microstrip line that tilts to extend to upper left side, the low side of the second vertical microstrip line is provided with the lower extension microstrip line extending to lower right, and upper and lower two extension microstrip lines are connected with upper and lower two L shaped ring-type microstrip lines respectively.
4. a kind of broadband and wide wave beam circular polarization four-arm spiral antenna according to claim 3, is characterized in that: described the first microband paste layer (2) is provided with the first center microstrip line (2-2) and is positioned at four L-type microstrip lines (2-1) of the first center microstrip line (2-2) periphery; Wherein, two L-type microstrip lines (2-1) of left and right are with respect to the Central Symmetry setting of the first microband paste layer (2), and two short handle levels of two L-type microstrip lines (2-1) of left and right and termination are oppositely arranged; Upper and lower two L-type microstrip lines (2-1) are with respect to the Central Symmetry setting of the first microband paste layer (2), and two long handles of upper and lower two L-type microstrip lines (2-1) are vertical and termination is oppositely arranged; The first center microstrip line (2-2) comprises the first vertical microstrip line at first microband paste layer (2) center that is located at, the top of the first vertical microstrip line is provided with successively the level connecting extend to upper left microstrip line, microstrip line and the level microstrip line that extends to left down that extends straight down towards left L-type microstrip line (2-1), and the low side of the first vertical microstrip line is provided with the level microstrip line that extends to the right towards right L-type microstrip line (2-1);
The center of flaggy (4) is provided with coupling gap (4-1) medially; Coupling gap (4-1) comprises H shape coupling slot, and two terminations of H shape coupling slot upper end relative two levels seam that extends that is provided with respectively, also relative two levels seam that extends that is provided with respectively of two terminations of H shape coupling slot lower end; The second microband paste layer (6) is provided with yi word pattern microstrip line (6-2); Yi word pattern microstrip line (6-2) is horizontally set on the left side of the second vertical microstrip line; Center, the center in coupling gap (4-1) and the center of the second vertical microstrip line of the first vertical microstrip line are all on same vertical direction.
5. a kind of broadband and wide wave beam circular polarization four-arm spiral antenna according to claim 4, it is characterized in that: straight down and be located at the left side of its long handle portion, the short handle portion of lower L shaped ring-type microstrip line straight up and be located at the right side of its long handle portion in the short handle portion of upper L shaped ring-type microstrip line; The left side, termination of the short handle portion of upper L shaped ring-type microstrip line and the middle part upside of its long handle portion are respectively equipped with first time output port (6-4) and second time output port (6-5), and the right side, termination of the short handle portion of lower L shaped ring-type microstrip line and the middle part downside of its long handle portion are respectively equipped with the 3rd time output port (6-6) and the 4th time output port (6-7);
The short handle portion level of upper L-type microstrip line (2-1) arranges and is located at the top of its long handle portion left, the short handle portion level of lower L-type microstrip line (2-1) arranges and is located at the bottom of its long handle portion to the right, the long handle portion of left L-type microstrip line (2-1) arranges and is located at the left end of its short handle portion straight up, and the long handle portion of right L-type microstrip line (2-1) arranges and be located at the right-hand member of its short handle portion straight down; The termination of the long handle portion of left L-type microstrip line (2-1) is provided with input port on first (2-3), the termination of the short handle portion of upper L-type microstrip line (2-1) is provided with input port on second (2-4), the termination of the long handle portion of right L-type microstrip line (2-1) is provided with input port on the 3rd (2-5), and the termination of the short handle portion of lower L-type microstrip line (2-1) is provided with input port on the 4th (2-6);
First to fourth time output port (6-4 to 6-7) is connected with the upper corresponding circular gap (4-2) of flaggy (4) medially of passing that it is vertical that input port (2-3 to 2-6) on first to fourth adopts respectively probe one to one;
The left end of yi word pattern microstrip line (6-2) is provided with lower input port (6-9), and the port of the right-hand member of yi word pattern microstrip line (6-2) is by vertical being connected through extend the to left down port (2-11) of microstrip line left end of the upper corresponding circular gap (4-2) of flaggy (4) medially and the level of the first center microstrip line (2-2) of probe;
The termination of the termination of the termination of the termination of the short handle portion of left L-type microstrip line (2-1), the long handle portion of lower L-type microstrip line (2-1), the short handle portion of right L-type microstrip line (2-1) and the long handle portion of upper L-type microstrip line (2-1) is respectively equipped with output port (2-7 to 2-10) on first to fourth; On first to fourth output port (2-7 to 2-10) respectively with four bottom metal sheets (1-2-3) corresponding welding one by one.
6. a kind of broadband and wide wave beam circular polarization four-arm spiral antenna according to claim 5, is characterized in that: the circular gap (4-2) on described flaggy medially (4) forms coaxial configuration with the probe through gap respectively; The termination of the long handle portion of upper and lower two L shaped ring-type microstrip lines is respectively provided with a coupling port (6-8), and each coupling port (6-8) is respectively equipped with the resistance of one 50 ohm.
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| CN105244606A (en) * | 2015-11-11 | 2016-01-13 | 上海海积信息科技股份有限公司 | Quadrifilar helix antenna |
| CN106450762A (en) * | 2016-10-19 | 2017-02-22 | 厦门致联科技有限公司 | Compact symmetrical feed network |
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| WO2018121152A1 (en) * | 2016-12-29 | 2018-07-05 | 深圳市景程信息科技有限公司 | Circularly polarized antenna having dual-frequency broadband function |
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| WO2020087390A1 (en) * | 2018-10-31 | 2020-05-07 | 深圳市大疆创新科技有限公司 | Helical antenna and communication device |
| WO2020087391A1 (en) * | 2018-10-31 | 2020-05-07 | 深圳市大疆创新科技有限公司 | Spiral antenna and communication device |
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| WO2018121152A1 (en) * | 2016-12-29 | 2018-07-05 | 深圳市景程信息科技有限公司 | Circularly polarized antenna having dual-frequency broadband function |
| CN108258416A (en) * | 2016-12-29 | 2018-07-06 | 深圳市景程信息科技有限公司 | Double-frequency broadband patch circular polarized antenna |
| CN108258416B (en) * | 2016-12-29 | 2020-02-04 | 深圳市景程信息科技有限公司 | Dual-frequency broadband patch circularly polarized antenna |
| CN108682944A (en) * | 2018-05-02 | 2018-10-19 | 电子科技大学 | A kind of miniaturization low section ultra wide band logarithm period monopole array antenna |
| CN109462032A (en) * | 2018-10-10 | 2019-03-12 | 江苏三和欣创通信科技有限公司 | A kind of more star dual-band antennas based on multi-arm spiral |
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| US11085491B1 (en) * | 2020-06-08 | 2021-08-10 | Robert Janian | Self lubricating bearing sleeve |
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