CN107634343A - A kind of coplanar Shared aperture antenna for base station of two-band - Google Patents

A kind of coplanar Shared aperture antenna for base station of two-band Download PDF

Info

Publication number
CN107634343A
CN107634343A CN201710782963.5A CN201710782963A CN107634343A CN 107634343 A CN107634343 A CN 107634343A CN 201710782963 A CN201710782963 A CN 201710782963A CN 107634343 A CN107634343 A CN 107634343A
Authority
CN
China
Prior art keywords
medium substrate
antenna
floor
coplanar
base station
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201710782963.5A
Other languages
Chinese (zh)
Inventor
林先其
聂丽瑛
王豹
张瑾
刘士林
苏洪
苏一洪
陈依军
樊勇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
University of Electronic Science and Technology of China
Original Assignee
University of Electronic Science and Technology of China
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by University of Electronic Science and Technology of China filed Critical University of Electronic Science and Technology of China
Priority to CN201710782963.5A priority Critical patent/CN107634343A/en
Publication of CN107634343A publication Critical patent/CN107634343A/en
Pending legal-status Critical Current

Links

Landscapes

  • Details Of Aerials (AREA)

Abstract

The invention discloses a kind of coplanar Shared aperture antenna for base station of two-band, is made up of feed circuit plate (2), reflection floor (3), the dipole antenna (5) being printed on first medium substrate (4) and suspension paster antenna (6).The present invention can be used in microwave and millimeter wave communication system, particularly the antenna for base station of the coplanar Shared aperture of two-band.Its advantage is low section height, planarization, in light weight, inexpensive, the process-cycle is fast.

Description

A kind of coplanar Shared aperture antenna for base station of two-band
Technical field
The invention belongs to microwave antenna art field, more particularly to the two-band coplanar Shared aperture base station day in microwave antenna Line.
Background technology
With the fast development of Modern Communication System, mobile base station is also towards low section, miniaturization, lightweight, low cost Direction develop.And exactly caused one kind is applied to mobile base station to two-band even multiband coplanar antennae under these circumstances There is low section, multi-frequency multi-mode, the integrated antenna of low cost, the coplanar antenna for base station of two-band meeting mobile base station to more While the requirement of frequency multimode, greatly improve cost that the non-coplanar design of height band antenna in traditional base station brings and The situation of space waste.
In traditional antenna for base station design, high band and low-frequency range are typically all to add reflecting plate to realize using dipole.For The one-way radiation performance of antenna is realized, the distance of dipole is liftoff plate follows quarter-wave principle.Due to high band It is larger with low-frequency range frequency distance so that high band dipole must will be less than low-frequency range dipole phase relative to the height on floor For the height on floor, even if low-frequency range dipole may use the technology of some reduction section heights to cause whole height to drop Low, height frequency range dipole can not be realized in approximately the same plane.Therefore, the whole height of traditional base station antenna is limited to low The height of frequency dipole, section is higher, and space-consuming is big, and volume is big, and high processing costs, not easy of integration, is unfavorable for advising greatly Mould produces, and needs improvement badly.
The content of the invention
The purpose of the present invention is to propose to a kind of coplanar Shared aperture antenna for base station of two-band, existing antenna for base station section is overcome High, the shortcomings that low-and high-frequency is non-coplanar, weight is heavy, volume is big, high processing costs.
The technical scheme is that:A kind of coplanar Shared aperture antenna for base station of two-band, including raddiating circuit plate, feed electricity Road plate, reflection floor;Described raddiating circuit plate includes first medium substrate, the dipole day being printed on first medium substrate Line and suspension paster antenna;Described feed circuit plate includes second medium substrate, the 3rd medium substrate, printing second medium The 180 degree feeding network of substrate front side, 0 degree of feeding network for printing the positive shared floor of the 3rd medium substrate and reverse side; Described raddiating circuit plate and reflection floor normal direction is coaxial, and described feed circuit plate is located in raddiating circuit plate and reflection floor Between normal direction axis on.
Further, dipole antenna includes being printed on the first dipole arm of first medium substrate back, is printed on the Positive second dipole arm of one medium substrate, the first feed circular hole etched in the second dipole arm, two parasitic triangulars The the second feed circular hole of paster, pad and etching on pad;First dipole arm and the second dipole arm size complete one Sample;Two parasitic triangular shape paster is symmetrically placed and size is identical;First feed circular hole and the second feed circular hole are situated between positioned at first The surface of non-metallic through hole on matter substrate.
Further, printing the 180 degree feeding network of second medium substrate front side includes positive parallel wire part, the first resistance Resistance changes microstrip line and the first shape of falling G coupling line.
Further, it is printed on 0 degree of feeding network at the 3rd medium substrate back side and is printed on second medium substrate front side 180 degree feeding network on feed circuit plate vertical axis Central Symmetry;0 degree of described feeding network includes negative parallel wire Partly, the second impedance conversion microstrip line and the second shape of falling G coupling line;Described positive parallel wire part and negative parallel wire part The surface of the 3rd feed circular hole on reflection floor.
Further, be printed on the positive shared floor of the 3rd medium substrate include notched horizontal rectangle floor and Two short-circuiting metal strips;Two short-circuiting metal strips by pin pass through first medium substrate in through hole, suspension paster antenna on Short-circuit through hole with suspension paster antenna be connected;Horizontal rectangle floor is connected with reflection floor.
The advantages of the present invention:
(1) compare has that planarization, section height be low, structure with the non-coplanar two-band antenna for base station of tradition, the present invention The advantages of compact.Compared with the non-coplanar antenna for base station of traditional low-and high-frequency segment unit, ensureing width of the antenna in two frequency ranges In the case of band and good directional diagram, by by two frequency ranges be respectively adopted dipole antenna and suspension paster antenna print it is same On block dielectric-slab, the overall section height of antenna is reduced, weight is lighter, and cost is lower, and the process-cycle is shorter;
(2) compared with existing coplanar dual-band antenna, the coplanar common reflector unit low-and high-frequency of two-band in the present invention Section is fed by two feed ports respectively, extra power splitter is not needed in group battle array design, after reducing group battle array Cost.
(3) the coplanar common reflector of two-band of the invention using dipole due to being nested in annular suspension paster antenna Between realize, the impedance matching of the dipole antenna of high band can be easily achieved by adjusting the size of annular paster antenna.
(4) the differential feed network print that low-frequency range feeding network is related in the coplanar common reflector of two-band of the invention Brush is in vertical supporting plate, and so as to solve, back is close to the design of metallic plate feeding network due to antenna in actual use The problem of difficult.
Brief description of the drawings
Fig. 1 is the general structure schematic diagram of the present invention
Fig. 2 is the low-frequency range feed section structural representation of the present invention
Fig. 3 is the high band dipole antenna configuration schematic diagram of the present invention
Embodiment
The present invention will be further described with specific embodiment below in conjunction with the accompanying drawings:As shown in figure 1, a kind of two-band is coplanar Shared aperture antenna for base station, including raddiating circuit plate 1, feed circuit plate 2, reflection floor 3;Described raddiating circuit plate 1 includes the One medium substrate 4, the dipole antenna 5 being printed on first medium substrate 4 and suspension paster antenna 6;Described feed electricity Road plate 2 includes second medium substrate 7, the 3rd medium substrate 8,7 positive 180 degree feeding network 9 of printing second medium substrate, print Brush 0 degree of feeding network 11 of 8 positive shared floor 10 of the 3rd medium substrate and reverse side;Described raddiating circuit plate 1 and anti- Penetrate that the normal direction of floor 3 is coaxial, described feed circuit plate 2 is located at raddiating circuit plate 1 and reflected on the normal direction axis among floor 3.
Further, dipole antenna 5 includes being printed on first dipole arm 51 at the back side of first medium substrate 4, printing In the first feed circular hole 54, two of positive second dipole arm 52 of first medium substrate 4, etching in the second dipole arm 52 The the second feed circular hole 56 of individual parasitic triangular paster 53, pad 54 and etching on pad 54;First dipole arm 51 and The size of two dipole arm 52 is just the same;Two parasitic triangular shape paster 53 is symmetrically placed and size is identical;First feed circular hole 54 and second feed circular hole 56 be located at the surface of non-metallic through hole 41 on first medium substrate 4.
Further, printing 7 positive 180 degree feeding network 9 of second medium substrate includes positive parallel wire part 91, the One impedance converts the shape of the falling G coupling line 93 of microstrip line 92 and first.
Further, it is printed on 0 degree of feeding network 11 at the back side of the 3rd medium substrate 8 and is printed on second medium substrate 7 Positive 180 degree feeding network 9 is on the vertical axis Central Symmetry of feed circuit plate 2;0 degree of described feeding network 11 includes negative Parallel wire part 111, the second impedance conversion shape of falling G coupling line 113 of microstrip line 112 and second;Described positive parallel wire portion Points 91 and the surface of threeth feed circular hole 31 of the negative parallel wire part 111 on reflection floor 3.
Further, it is printed on 8 positive shared floor 10 of the 3rd medium substrate with including notched horizontal rectangle Plate 102 and two short-circuiting metal strips 101;Two short-circuiting metal strips 101 pass through the through hole in first medium substrate 4 by pin 42nd, the short-circuit through hole 61 suspended on paster antenna 6 is connected with suspension paster antenna 6;Horizontal rectangle floor 102 and reflection floor 3 connections.
The principle of technical scheme is:The dipole antenna 5 being printed on first medium substrate 4 is operated in high frequency Section, by adjusting the gap between two parasitic triangular pasters 53 and dipole antenna 5 so that the void of high frequency dipole antenna 5 Portion becomes more flat.Suspension paster antenna 6 as low frequency radiation device acts not only as suspension paster and is operated in low-frequency range, But also the impedance matching of high frequency dipole antenna 5 can be influenceed, the adjustment suspension inner edge of paster antenna 6 is apart from dipole antenna 5 Distance can cause the input impedance of dipole antenna 5 being matched to good in broadband.Suspension paster antenna 6 passes through print The differential feed network feeder on feed circuit plate 2 is brushed, differential feed network leads to by the way that parallel wire is converted into microstrip line Cross the first shape of falling G coupling line 93 and the second shape of falling G coupling line 113 and give the suspension couple feed of paster antenna 6.Adjust the first shape of falling G The position dimension of the shape of the falling G coupling line 113 of coupling line 93 and second can adjust the impedance matching of low-frequency range suspension paster antenna 6. For the impedance matching of further adjustment suspension paster antenna 6, two short-circuiting metal strips 101, regulation the first shape of falling G coupling are introduced The gap of 93 and second shape of falling G coupling line of line 113, two short-circuiting metal strips 101 of distance, low-frequency range suspension paster day can make it that Line reaches preferable matching status
To further illustrate the exploitativeness of above-mentioned technical proposal, a specific design example, a kind of double frequency is given below The coplanar Shared aperture antenna for base station of section, the low-frequency range suspension paster antenna 6 of design are operated in 820MHz~960MHz, high band dipole The working frequency range of sub-antenna 5 is 1710MHz~2690MHz.The suspension ring inner edge size of paster antenna 6 be 80mm × 80mm, ring outside Size is 130mm × 160mm, and the square arm length of side of dipole antenna 5 two is 22mm, the isosceles triangle two of end corner cut The individual a length of 5mm of waist edge.The first impedance conversion microstrip line 92 and second impedance conversion length of microstrip line 112 is 70.65mm, width It is 2.2mm, the first shape of falling G coupling line 93 and the height of the second shape of falling G coupling line 113 are 27.5mm, and lateral length is 25mm, end vertical height are 20mm, the long 5mm in terminal horizontal part, the first shape of falling G coupling line 93 and the second shape of falling G coupling line Gap width between 113 and vertical short-circuiting metal strip 101 is 0.8mm.Short-circuiting metal strip 101 long 26mm, wide 2mm.It is parallel Two-wire partial width is 5.5mm.2 high 40mm of feed circuit plate.Test result shows that low-frequency range suspension paster antenna 6 exists 796MHz~984MHz frequency bands standing internal wave is less than 2, and maximum gain scope is 8.5dB~9.5dB.The work of high band dipole antenna 5 It is 1474MHz~2781MHz to make frequency range, and standing wave is less than 2, and maximum gain scope is 7.6dB~10.1dB.Both ends in high-low frequency band Isolation between mouthful is all higher than 23dB.
One of ordinary skill in the art will be appreciated that embodiment described here is to aid in reader and understands this hair Bright principle, it should be understood that protection scope of the present invention is not limited to such especially statement and embodiment.This area Those of ordinary skill can make the various other various tools for not departing from the present invention according to these technical inspirations disclosed by the invention Body deforms and combination, and these deformations and combination are still within the scope of the present invention.

Claims (5)

1. a kind of coplanar Shared aperture antenna for base station of two-band, including raddiating circuit plate (1), feed circuit plate (2), reflection floor (3);It is characterized in that:Described raddiating circuit plate (1) includes first medium substrate (4), is printed on first medium substrate (4) Dipole antenna (5) and suspension paster antenna (6);Described feed circuit plate (2) includes second medium substrate (7), the Three medium substrates (8), the positive 180 degree feeding network (9) of printing second medium substrate (7), the 3rd medium substrate (8) of printing are just The shared floor (10) in face and 0 degree of feeding network (11) of reverse side;Described raddiating circuit plate (1) and reflection floor (3) method It is located at raddiating circuit plate (1) to coaxial, described feed circuit plate (2) and reflects on the normal direction axis among floor (3).
A kind of 2. coplanar Shared aperture antenna for base station of two-band according to claim 1, it is characterised in that:Described dipole Antenna (5) includes being printed on first dipole arm (51) at first medium substrate (4) back side, is printed on first medium substrate (4) The first feed circular hole (54), two parasitisms three of positive second dipole arm (52), etching in the second dipole arm (52) The the second feed circular hole (56) of butt chock (53), pad (54) and etching on pad (54);First dipole arm (51) and Second dipole arm (52) size is just the same;Two parasitic triangular shape paster (53) is symmetrically placed and size is identical;First feedback Electric circular hole (54) and the second feed circular hole (56) are located at the surface of the non-metallic through hole (41) on first medium substrate (4).
A kind of 3. coplanar Shared aperture antenna for base station of two-band according to claim 1, it is characterised in that:Described printing The positive 180 degree feeding network (9) of second medium substrate (7) includes positive parallel wire part (91), the first impedance conversion microstrip line And the first shape of falling G coupling line (93) (92).
A kind of 4. coplanar Shared aperture antenna for base station of two-band according to claim 1, it is characterised in that:Described is printed on 0 degree of feeding network (11) at the 3rd medium substrate (8) back side is with being printed on the positive 180 degree transmission network of second medium substrate (7) Network (9) is on feed circuit plate (2) vertical axis Central Symmetry;0 degree of described feeding network (11) includes negative parallel wire portion Divide (111), the second impedance conversion microstrip line (112) and the second shape of falling G coupling line (113);Described positive parallel wire part (91) and negative parallel wire part (111) is positioned at the surface of the 3rd feed circular hole (31) reflected on floor (3).
A kind of 5. coplanar Shared aperture antenna for base station of two-band according to claim 1, it is characterised in that:Described is printed on The positive shared floor (10) of 3rd medium substrate (8) includes notched horizontal rectangle floor (102) and two short circuit gold Belong to bar (101);Two short-circuiting metal strips (101) pass through through hole (42), suspension paster in first medium substrate (4) by pin Short-circuit through hole (61) on antenna (6) is connected with suspension paster antenna (6);Horizontal rectangle floor (102) and reflection floor (3) Connection.
CN201710782963.5A 2017-09-03 2017-09-03 A kind of coplanar Shared aperture antenna for base station of two-band Pending CN107634343A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710782963.5A CN107634343A (en) 2017-09-03 2017-09-03 A kind of coplanar Shared aperture antenna for base station of two-band

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710782963.5A CN107634343A (en) 2017-09-03 2017-09-03 A kind of coplanar Shared aperture antenna for base station of two-band

Publications (1)

Publication Number Publication Date
CN107634343A true CN107634343A (en) 2018-01-26

Family

ID=61099806

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710782963.5A Pending CN107634343A (en) 2017-09-03 2017-09-03 A kind of coplanar Shared aperture antenna for base station of two-band

Country Status (1)

Country Link
CN (1) CN107634343A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108767455A (en) * 2018-05-07 2018-11-06 电子科技大学 A kind of two-port ultra wide band combined antenna that plane is co-structured
CN109524796A (en) * 2018-12-11 2019-03-26 中国电子科技集团公司信息科学研究院 A kind of low scattering slot array antenna of broadband low section
CN109728440A (en) * 2018-12-29 2019-05-07 电子科技大学 A kind of planar broad band lens antenna based on transmitting-receiving structure type
CN110380199A (en) * 2019-06-20 2019-10-25 上海交通大学 Shared aperture dual-band array antenna based on micro-strip grid and patch
CN114156659A (en) * 2021-11-30 2022-03-08 杭州电子科技大学 Broadband common-caliber dipole array of Sub-6GHz and millimeter wave frequency bands
CN116014451A (en) * 2022-12-01 2023-04-25 黑龙江大学 Broadband double-back-cavity polarized reconfigurable antenna based on liquid metal switch

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1252174A (en) * 1997-02-14 2000-05-03 艾利森电话股份有限公司 Device in antenna units
US20050007286A1 (en) * 2003-07-11 2005-01-13 Trott Keith D. Wideband phased array radiator
US20060109192A1 (en) * 2004-11-22 2006-05-25 Steven Weigand Compact antenna with directed radiation pattern
EP1887655A1 (en) * 2006-07-31 2008-02-13 THOMSON Licensing Slot type antenna with integrated amplifiers
JP2009225030A (en) * 2008-03-14 2009-10-01 Toshiba Corp Planar antenna
KR20110017986A (en) * 2009-08-17 2011-02-23 한밭대학교 산학협력단 Triple-band antenna
US20110260941A1 (en) * 2008-10-15 2011-10-27 Argus Technologies (Australia) Pty Ltd. Wideband radiating elements
CN103947041A (en) * 2011-11-15 2014-07-23 阿尔卡特朗讯 Wideband antenna
WO2015153703A1 (en) * 2014-04-04 2015-10-08 Cisco Technology, Inc. Dual-band printed omnidirectional antenna
CN105048078A (en) * 2015-06-17 2015-11-11 中国电子科技集团公司第五十四研究所 Common-caliber multi-frequency-band wide-beam circular-polarized antenna
CN106654529A (en) * 2016-12-29 2017-05-10 重庆邮电大学 Compact type dual polarization micro base station antenna with high isolation
CN107086369A (en) * 2017-04-27 2017-08-22 电子科技大学 A kind of low RCS Scanning Phased Array Antenna with Broadband based on strong mutual coupling effect

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1252174A (en) * 1997-02-14 2000-05-03 艾利森电话股份有限公司 Device in antenna units
US20050007286A1 (en) * 2003-07-11 2005-01-13 Trott Keith D. Wideband phased array radiator
US20060109192A1 (en) * 2004-11-22 2006-05-25 Steven Weigand Compact antenna with directed radiation pattern
EP1887655A1 (en) * 2006-07-31 2008-02-13 THOMSON Licensing Slot type antenna with integrated amplifiers
JP2009225030A (en) * 2008-03-14 2009-10-01 Toshiba Corp Planar antenna
US20110260941A1 (en) * 2008-10-15 2011-10-27 Argus Technologies (Australia) Pty Ltd. Wideband radiating elements
KR20110017986A (en) * 2009-08-17 2011-02-23 한밭대학교 산학협력단 Triple-band antenna
CN103947041A (en) * 2011-11-15 2014-07-23 阿尔卡特朗讯 Wideband antenna
WO2015153703A1 (en) * 2014-04-04 2015-10-08 Cisco Technology, Inc. Dual-band printed omnidirectional antenna
CN105048078A (en) * 2015-06-17 2015-11-11 中国电子科技集团公司第五十四研究所 Common-caliber multi-frequency-band wide-beam circular-polarized antenna
CN106654529A (en) * 2016-12-29 2017-05-10 重庆邮电大学 Compact type dual polarization micro base station antenna with high isolation
CN107086369A (en) * 2017-04-27 2017-08-22 电子科技大学 A kind of low RCS Scanning Phased Array Antenna with Broadband based on strong mutual coupling effect

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
A.K. BROWN等: "REFLECTOR ANTENNAS FOR HIGH POWER, NEAR FIELD ELLIPTICAL SPOT BEAMS WITH CIRCULAR POLARISATION", 《1993 EIGHTH INTERNATIONAL CONFERENCE ON ANTENNAS AND PROPAGATION》 *
张银 等: "双频共口径阵列天线的设计", 《2013年全国微波毫米波会议论文集》 *
王红星;刘锡国;刘敏;: "一种新型低剖面、双频、双极化宽频带阵列天线的研究与设计", 微波学报 *

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108767455A (en) * 2018-05-07 2018-11-06 电子科技大学 A kind of two-port ultra wide band combined antenna that plane is co-structured
CN108767455B (en) * 2018-05-07 2024-01-26 电子科技大学 Planar co-structure two-port ultra-wideband composite antenna
CN109524796A (en) * 2018-12-11 2019-03-26 中国电子科技集团公司信息科学研究院 A kind of low scattering slot array antenna of broadband low section
CN109728440A (en) * 2018-12-29 2019-05-07 电子科技大学 A kind of planar broad band lens antenna based on transmitting-receiving structure type
CN110380199A (en) * 2019-06-20 2019-10-25 上海交通大学 Shared aperture dual-band array antenna based on micro-strip grid and patch
CN114156659A (en) * 2021-11-30 2022-03-08 杭州电子科技大学 Broadband common-caliber dipole array of Sub-6GHz and millimeter wave frequency bands
CN114156659B (en) * 2021-11-30 2024-02-02 杭州电子科技大学 Broadband common-caliber dipole array of Sub-6GHz and millimeter wave frequency bands
CN116014451A (en) * 2022-12-01 2023-04-25 黑龙江大学 Broadband double-back-cavity polarized reconfigurable antenna based on liquid metal switch
CN116014451B (en) * 2022-12-01 2024-05-14 黑龙江大学 Broadband double-back-cavity polarized reconfigurable antenna based on liquid metal switch

Similar Documents

Publication Publication Date Title
CN107634343A (en) A kind of coplanar Shared aperture antenna for base station of two-band
EP3007275B1 (en) Antenna radiation unit and antenna
CN105977634B (en) A kind of LTE Whole frequency band antenna structure of mobile phole
CN104795630A (en) Dual-band omnidirectional WIFI (wireless fidelity) antenna
CN101192702B (en) Double frequency antenna
CN206850029U (en) High-frequency ultra-wideband dual polarization all-wave radiating element
CN107181068A (en) High-frequency ultra-wideband dual polarization all-wave radiating element
CN101752675A (en) Double-frequency antenna and wireless communication device applying same
WO2019223318A1 (en) Indoor base station and pifa antenna thereof
CN101997160B (en) Dual band antenna and wireless communication device using same
US20110122042A1 (en) Antenna with Multi-Bands
TW393807B (en) A multi-frequency antenna
US20090073050A1 (en) Dual band antenna
CN104953295A (en) Small-size directional slot antenna
CN107706546B (en) Multi-band antenna with parasitic coupling feed
US20090278745A1 (en) Dual-band inverted-f antenna
CN113131178B (en) Direction-finding antenna, direction-finding antenna system and electronic equipment
CN110690561B (en) Broadband miniaturized antenna applied to satellite navigation terminal and working method thereof
TWI426657B (en) Double V-type dual-band antenna
CN106450708A (en) Radiating unit for double-band nested base station antenna
CN208608358U (en) A kind of monopole ultra-wideband antenna
CN103560318B (en) A kind of miniaturized directed radiation printed antenna
CN207409650U (en) A kind of microstrip antenna
EP4340124A1 (en) Radiation unit and base station antenna
CN101447600B (en) Antenna

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
WD01 Invention patent application deemed withdrawn after publication
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20180126