CN202616407U - Ultra-wideband antenna of integrated polygonal resonant cavity - Google Patents
Ultra-wideband antenna of integrated polygonal resonant cavity Download PDFInfo
- Publication number
- CN202616407U CN202616407U CN 201220203095 CN201220203095U CN202616407U CN 202616407 U CN202616407 U CN 202616407U CN 201220203095 CN201220203095 CN 201220203095 CN 201220203095 U CN201220203095 U CN 201220203095U CN 202616407 U CN202616407 U CN 202616407U
- Authority
- CN
- China
- Prior art keywords
- resonant cavity
- regular pentagon
- ultra
- antenna
- radiating element
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Waveguide Aerials (AREA)
Abstract
The utility model aims to provide an ultra-wideband antenna of an integrated polygonal resonant cavity. The ultra-wideband antenna comprises a dielectric substrate, a regular pentagonal radiating unit, a wide slot structure, a regular pentagonal resonant cavity, a step shaped impedance tuning wand, a pair of symmetric L-shaped grooves, a clearance on the regular pentagonal resonant cavity, a coplanar waveguide grounding face, a coplanar waveguide feed signal strip line and a coplanar waveguide feed structure, wherein the regular pentagonal radiating unit, the wide slot structure, the regular pentagonal resonant cavity, the step shaped impedance tuning wand, the pair of symmetric L-shaped grooves, the clearance on the regular pentagonal resonant cavity, the coplanar waveguide grounding face and the coplanar waveguide feed signal strip line are printed on the dielectric substrate; the regular pentagonal radiating unit is placed in the wide slot structure, and the regular pentagonal resonant cavity loaded via the step shaped impedance turning wand is etched above the regular pentagonal resonant cavity; and the pair of L-shaped grooves are symmetrically etched at the lower part of the coplanar waveguide grounding face in form of mirror image. The ultra-wideband antenna has a simple structure, wide bandwidth, high radiating efficiency, and has the trapped wave character.
Description
Technical field
The utility model relates to a kind of planographic plate antenna, particularly relate to a kind of ultra-wideband antenna of integrated polygon resonant cavity.
Background technology
Because radio communication equipment and electronic message unit develop towards multifunction, miniaturization, ultra broadband and the friendly direction of coordinating with surrounding environment, this makes broadband, miniaturization, high-gain become one of hot subject of domestic and international research.In recent years; Various ultra-wideband antennas are come out one after another; Particularly adopt the ultra-wideband antenna of micro-band technique; This structure can be through taking a picture or photoetching technique is made, and polarization characteristic is preferably arranged, in the design of design that therefore should technology be applied in ultra-wideband antenna and relevant microwave circuit components and parts.Yet frequency band that present ultra-wideband communications is shared and WLAN have shared part; Therefore need the ultra-wideband antenna of design can reduce, even can not bring interference, therefore design the focus that the ultra-wideband antenna that has trap characteristic becomes present research to wireless local area.If suppress harmonic wave and parasitic emission through suitable design; Such antenna will can not produce electromagnetic interference near equipment; Jeopardize the operate as normal of system itself and neighbor systems, particularly the wireless local area network (WLAN) system to present use causes serious disturbance.Traditional mode is that the interpolation filter is the method for the most often using, and after system accomplishes, between antenna element and radio frequency component, adds suitable filters and solves.Common this method can cause antenna and microwave circuit not to match, even lowers the overall efficiency of system, and therefore designing the ultra-wideband antenna that has trap characteristic is one of important method of head it off.
Traditional printing ultra-wideband antenna mainly is cone antenna and printing discone antenna; In order to reduce volume; Chinese patent " a ultra broadband ladder floor printing monopole antenna, application numbers 2005100242288.7 " has been set forth a kind of ultra-wideband antenna based on notch cuttype ground plate and oval radiating element, but the limited bandwidth of this antenna; Still can not satisfy the application of UWB, and can not overcome the electromagnetic interference problem of UWB and WLAN.Document " Harmonic Control For An Integrated Microstrip Antenna With Loaded Transmission Line, Shun-Yun Lin, Kuang-Chih Huang; and Jin-Sen Chen.Microwave And Optical Technology Letters, Vol.44, No.4; February, 2005 " proposes a kind of periodic structure that utilizes and suppresses harmonic wave; Adopting directly increases periodic filter structure generation trap characteristic in the rear end of ultra-wideband antenna; Realize the collaborative work of UWB and WLAN, but volume is bigger, and complex structure.In order to overcome above-mentioned shortcoming, document " Design of a 5.8-GHzAntenna Incorporating a New Patch Antenna, Ching-Hong K.Chin; Quan Xue, Chi Hou Chan, IEEE Antennas And Wireless Propagation; Vol.4,2005 " has been set forth the method for etching filter on the coplanar wave guide feedback holding wire; Produce the characteristic of trap; But volume is still bigger, can not well realize the miniaturization Design of system, and this antenna making requires higher relatively.Document " A miniaturized monopole antenna for ultra-wide band applications with band-notch Filter, B.Ahmadi, R.Faraji-Dana; IET Microw.Antennas Propag., 2009, Vol.3; No.14, pp.1224 – 1231. " has been set forth the ultra-wideband antenna that has trap characteristic of etching U-lag and V-shaped groove, but volume is bigger; And adopt the gradual change feed structure, make troubles for design and debugging.Document " Compact CPW-fed ultra-wideband antenna with dual band-notched characteristics, Y.S.LI, X.D.Yang; C.Y.Liu, T.Jiang, Electronics Letters; 2010, vol.46, No.14 "; Be employed on the radiation source unit etching inverted U-channel and on the co-planar waveguide ground plane etching H shape groove, produce trap characteristic, this antenna is employed in the form of etching groove on the radiation element; Make the part electromagnetic wave leak, influence the antenna pattern of antenna.Document " Design of a new UWB integrated antenna filter with a rejected WLAN band at 5.8GHz; A.Djaiz, M.Nedil, M.A.Habib and T.A.Denidni.Microwave and Optical Technology Letters; Vol.53; No.6,2011 ", this The thesis design the design that narrow band filter is realized trap characteristic on feed line; But this scheme only can realize single trap characteristic, and trap frequency is not easy to regulate.
Summary of the invention
It is a kind of simple in structure that the purpose of the utility model is to provide, and bandwidth is wide, and radiation efficiency is high, has the ultra-wideband antenna of a kind of integrated polygon resonant cavity of trap characteristic.
The purpose of the utility model is achieved in that
Comprise impedance-tumed excellent 104, the L shaped groove 107 of a pair of symmetry of medium substrate 109, regular pentagon radiating element 103, sipes structure 105, regular pentagon resonant cavity 108, scalariform, the slit 106 on the regular pentagon resonant cavity, co-planar waveguide ground plane 102, coplanar wave guide feedback signal band line 101, coplanar wave guide feedback structure; Impedance-tumed excellent 104, the L shaped groove 107 of a pair of symmetry of regular pentagon radiating element 103, sipes structure 105, regular pentagon resonant cavity 108, scalariform, the slit 106 on the regular pentagon resonant cavity, co-planar waveguide ground plane 102, coplanar wave guide feedback signal band line 101 are printed on the medium substrate; The coplanar wave guide feedback structure is made up of coplanar wave guide feedback signal band line 101 and co-planar waveguide ground plane 102; And coplanar wave guide feedback signal band line 101 is positioned at the centre of co-planar waveguide ground plane 102; In etching sipes structure 105 on 102 on the co-planar waveguide ground plane; The perpendicular bisector of regular pentagon is vertical with horizontal direction; Regular pentagon radiating element 103 is positioned at the inside of sipes structure 105; The perpendicular bisector of regular pentagon radiating element 103 is vertical with horizontal direction; Slit 106 on the regular pentagon resonant cavity is positioned at the top of regular pentagon radiating element 103, and regular pentagon radiating element 103 is connected with co-planar waveguide electric feed signal band line 101, the regular pentagon resonant cavity 108 that etching scalariform impedance-tumed excellent 104 loads on regular pentagon radiating element 103; The base of regular pentagon resonant cavity 108 and horizontal direction parallel, the L shaped groove 107 of a pair of symmetry of mirror image symmetry etching in the bottom of co-planar waveguide ground plane 102.
Described scalariform impedance-tumed excellent 104 is rectangular configuration, circular configuration or triangular structure.
The advantage of the utility model is:
1, can realize wideer impedance bandwidth, the ultra-wideband antenna that designs through the L shaped groove structure of a pair of symmetry of etching on the co-planar waveguide ground plane, the impedance bandwidth of broadening antenna covers the whole frequency of UWB.The ultra-wideband antenna that designs can cover 2.72GHz-11.12GHz, in the WLAN frequency range, produces a notch simultaneously, suppresses the potential interference of WLAN, realizes the collaborative work of UWB and WLAN;
2, adopt the method for designing of integrated sipes technology resonant cavity wave filter technology; Effectively reduce antenna volume; Simultaneously can be through the needed trap frequency of Design Theory of resonant cavity filter; Be convenient to design and produce debugging, and can design the ultra-wideband antenna of adjustable notch filter according to actual needs.
3, adopt the sipes structure, not only effectively improve the impedance bandwidth of designing antenna, simultaneously can be through changing the coupling between regular pentagon sipes structure and the regular pentagon radiating element; Change distributed capacitance and branch's inductance of antenna, thereby change the impedance bandwidth of antenna, this antenna structure is simple; Compact; Volume is little, and is easy to process, and cost is low.
Description of drawings
Fig. 1 is the basic structure vertical view of the utility model execution mode 1;
Fig. 2 is the basic structure front view of the utility model execution mode 1;
Fig. 3 is the regular pentagon cavity resonator structure that the impedance-tumed rod of the scalariform of the utility model execution mode 1 loads;
Fig. 4 is the basic structure end view of the utility model execution mode 1;
Fig. 5 is the stationary wave characteristic curve of the utility model execution mode 1;
Fig. 6 is the vertical view of the basic structure of the utility model execution mode 2;
Fig. 7 is the standing wave curve of the utility model execution mode 2;
Fig. 8 is the vertical view of the basic structure of the utility model execution mode 3;
Fig. 9 is the standing wave curve of the utility model execution mode 3.
Embodiment
Giving an example below in conjunction with accompanying drawing, this is done in more detail utility model and describes:
The utility model belongs to the monopole antenna of coplanar wave guide feedback; This antenna is printed on the medium substrate, and its radiating element is the regular pentagon paster, regular pentagon sipes of etching on the co-planar waveguide ground plane; The antenna that designs in order to make covers the bandwidth of operation of whole ultra broadband; The L shaped groove of a pair of symmetry of etching on the co-planar waveguide ground plane, further the impedance bandwidth of broadening antenna makes the antenna that is designed can cover the UWB communication bandwidth; In addition; Exist the frequency sharing part between ultra-wideband communication system and the conventional narrowband systems; The antenna that designs in order to make can satisfy ultra-wideband communication system and narrowband systems communications for coordination such as (like WLANs); The regular pentagon resonant cavity that the impedance-tumed rod of integrated scalariform loads on the regular pentagon paster, thus a notch produced, realize the collaborative work of UWB and WLAN (5.15GHz-5.825GHz).This antenna has good impedance bandwidth and trap characteristic, and the centre frequency of notch can regulate, and has therefore increased its scope of application greatly.The utility model adopts printed antenna structure and coplanar wave guide feedback structure, greatly reduces antenna volume, and more integrated than being easier to the radio-frequency front-end microwave integrated circuit.
The technical scheme that the utility model adopts is:
1, radiating element adopts the regular pentagon paster, is similar to traditional printed monopole antenna, is convenient to design and making, and can guarantees impedance matching preferably, realizes the broadband impedance matching, and omnidirectional radiation characteristic is preferably arranged simultaneously.
2, the utility model adopts the coplanar wave guide feedback structure, and the electric feed signal band line of coplanar wave guide feedback structure directly is connected with the regular pentagon radiating element, is similar to the monopole antenna structure thereby constitute.
3, the utility model is employed in the method for the regular pentagon resonant cavity that the impedance-tumed rod of scalariform of etching loads on the regular pentagon radiating element; Effectively monopole antenna resonant cavity filter is combined, thereby constitute the ultra-wideband antenna that has trap characteristic.Through changing the parameter of the impedance-tumed excellent regular pentagon resonant cavity that loads of scalariform, change the distributed capacitance and the distributed inductance of resonant cavity, thereby change the centre frequency and the notch of trap characteristic, design well behaved trap ultra-wideband antenna.
4, the L shaped groove of the utility model a pair of symmetry of etching on the co-planar waveguide ground plane; Effectively change the CURRENT DISTRIBUTION of co-planar waveguide ground plane; The path of flowing through of swelling current, thus the impedance bandwidth of increase antenna makes the antenna that is designed satisfy the communication requirement of ultra broadband.
Execution mode 1:
Like Fig. 1, Fig. 2, Fig. 3 and shown in Figure 4, the antenna that is designed is made up of impedance-tumed excellent 104, the L shaped groove 107 of a pair of symmetry of medium substrate 109, regular pentagon radiating element 103, sipes structure 105, regular pentagon resonant cavity 108, scalariform, the slit 106 on the regular pentagon resonant cavity, co-planar waveguide ground plane 102, coplanar wave guide feedback structure.The electric feed signal band line feed line 101 of coplanar wave guide feedback structure directly is connected with the SMA inner wire, and the outer conductor of SMA ground roll together connects ground 102 connections.According to Fig. 1, Fig. 2, Fig. 3 and structure shown in Figure 4,, just can satisfy its ultra broadband operating characteristic and trap characteristic as long as select suitable dimensions.
Fig. 5 is the standing-wave ratio curve that utilizes HFSS emulation; As can beappreciated from fig. 5 the impedance bandwidth at standing-wave ratio≤2:1 is 2.72-11.12GHz; Satisfy the demand of ultra-wideband communications; A trap characteristic is arranged between 4.26GHz-6.08GHZ, can eliminate or reduce the electromagnetic interference of ultra-wideband antenna WLAN and C-band.
Execution mode 2:
As shown in Figure 6, the another kind of embodiment of the utility model is on the basis of embodiment 1, does not have L shaped groove on the co-planar waveguide ground plate, and this antenna still can realize having trap characteristic ultra-wideband communications demand.The antenna that is designed is made up of slit 206, co-planar waveguide ground plane 202, coplanar wave guide feedback structure on impedance-tumed excellent 204, the regular pentagon resonant cavity of medium substrate, regular pentagon radiating element 203, sipes structure 205, regular pentagon resonant cavity 208, scalariform.It is on 2.65 the medium substrate that entire antenna is printed on dielectric constant.The electric feed signal band line 201 of the coplanar wave guide feedback structure of this antenna directly is connected with the SMA inner wire, and the outer conductor of SMA ground roll together connects ground 202 connections.According to structure shown in Figure 6,, just can satisfy its trap characteristic and ultra broadband operating characteristic as long as select suitable dimensions.
Fig. 7 is the standing-wave ratio curve that utilizes HFSS emulation, and as can beappreciated from fig. 7 the impedance bandwidth at standing-wave ratio≤2:1 is 2.74GHz-10.4GHz, satisfies the demand of ultra-wideband communications.A trap characteristic is arranged between 4.26GHz-6.08GHZ, can eliminate or reduce the electromagnetic interference of ultra-wideband antenna WLAN and C-band.
Execution mode 3:
As shown in Figure 8, the another kind of embodiment of the utility model is on the basis of embodiment 2, the regular pentagon cavity resonator structure that does not have the impedance-tumed rod of scalariform to load, and this antenna still satisfies the ultra-wideband communications demand.The antenna that is designed is made up of medium substrate, regular pentagon radiating element 303, sipes structure 305, co-planar waveguide ground plane 302, coplanar wave guide feedback structure.It is on 2.65 the medium substrate that entire antenna is printed on dielectric constant.The electric feed signal band line 301 of the coplanar wave guide feedback structure of this antenna directly is connected with the SMA inner wire, and the outer conductor of SMA ground roll together connects ground 302 connections.According to structure shown in Figure 8,, just can satisfy its ultra broadband operating characteristic as long as select suitable dimensions.
Fig. 9 is the standing-wave ratio curve that utilizes HFSS emulation, and as can beappreciated from fig. 9 the impedance bandwidth at standing-wave ratio≤2:1 is 2.74GHz-10.4GHz, can satisfy the demand of ultra-wideband communications.
Claims (2)
1. the ultra-wideband antenna of an integrated polygon resonant cavity is characterized in that: the L shaped groove (107), the slit (106) on the regular pentagon resonant cavity, co-planar waveguide ground plane (102), coplanar wave guide feedback signal band line (101), the coplanar wave guide feedback structure that comprise medium substrate (109), regular pentagon radiating element (103), sipes structure (105), regular pentagon resonant cavity (108), the impedance-tumed rod of scalariform (104), a pair of symmetry; The L shaped groove (107) of regular pentagon radiating element (103), sipes structure (105), regular pentagon resonant cavity (108), the impedance-tumed rod of scalariform (104), a pair of symmetry, the slit (106) on the regular pentagon resonant cavity, co-planar waveguide ground plane (102), coplanar wave guide feedback signal band line (101) are printed on the medium substrate; The coplanar wave guide feedback structure is made up of coplanar wave guide feedback signal band line (101) and co-planar waveguide ground plane (102); And coplanar wave guide feedback signal band line (101) is positioned at the centre of co-planar waveguide ground plane (102); Etching sipes structure (105) is gone up in (102) on the co-planar waveguide ground plane; Regular pentagon radiating element (103) is positioned at the inside of sipes structure (105); The perpendicular bisector of regular pentagon radiating element (103) is vertical with horizontal direction; Slit on the regular pentagon resonant cavity (106) is positioned at the top of regular pentagon radiating element (103); Regular pentagon radiating element (103) is connected with co-planar waveguide electric feed signal band line (101); Go up the regular pentagon resonant cavity (108) that the impedance-tumed rod of etching scalariform (104) loads at regular pentagon radiating element (103), the base and the horizontal direction parallel of regular pentagon resonant cavity (108), the L shaped groove (107) of a pair of symmetry of mirror image symmetry etching in the bottom of co-planar waveguide ground plane (102).
2. the ultra-wideband antenna of integrated polygon resonant cavity according to claim 1 is characterized in that: the impedance-tumed rod of described scalariform (104) is rectangular configuration, circular configuration or triangular structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220203095 CN202616407U (en) | 2012-05-08 | 2012-05-08 | Ultra-wideband antenna of integrated polygonal resonant cavity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220203095 CN202616407U (en) | 2012-05-08 | 2012-05-08 | Ultra-wideband antenna of integrated polygonal resonant cavity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202616407U true CN202616407U (en) | 2012-12-19 |
Family
ID=47350077
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220203095 Expired - Fee Related CN202616407U (en) | 2012-05-08 | 2012-05-08 | Ultra-wideband antenna of integrated polygonal resonant cavity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202616407U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103594788A (en) * | 2013-11-07 | 2014-02-19 | 中国计量学院 | Slotted ultra-wideband antenna with double-band-stop characteristics |
| CN104733836A (en) * | 2015-01-30 | 2015-06-24 | 菲力克斯电子（宁波）有限公司 | Slot antenna |
| CN104953258A (en) * | 2015-06-04 | 2015-09-30 | 电子科技大学 | Multi-band tunable antenna |
| CN106654556A (en) * | 2016-12-16 | 2017-05-10 | 电子科技大学 | Miniature broadband antenna suitable for 5G communication |
| CN107425278A (en) * | 2017-08-09 | 2017-12-01 | 华南理工大学 | The square slot ultra wideband antenna of coplanar wave guide feedback |
| CN107994326A (en) * | 2017-12-06 | 2018-05-04 | 北京华镁钛科技有限公司 | A kind of U wave band Broadband Circular Polarization Microstrip Antenna |
| CN110474157A (en) * | 2019-08-27 | 2019-11-19 | 南京邮电大学 | A kind of mobile communication frequency range printed monopole antenna |
| CN111276808A (en) * | 2020-03-12 | 2020-06-12 | 南京理工大学 | Omnidirectional ultra-wideband antenna |
-
2012
- 2012-05-08 CN CN 201220203095 patent/CN202616407U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103594788A (en) * | 2013-11-07 | 2014-02-19 | 中国计量学院 | Slotted ultra-wideband antenna with double-band-stop characteristics |
| CN104733836A (en) * | 2015-01-30 | 2015-06-24 | 菲力克斯电子（宁波）有限公司 | Slot antenna |
| CN104953258A (en) * | 2015-06-04 | 2015-09-30 | 电子科技大学 | Multi-band tunable antenna |
| CN104953258B (en) * | 2015-06-04 | 2017-08-11 | 电子科技大学 | A kind of multiband tunable antenna |
| CN106654556A (en) * | 2016-12-16 | 2017-05-10 | 电子科技大学 | Miniature broadband antenna suitable for 5G communication |
| CN106654556B (en) * | 2016-12-16 | 2019-05-14 | 电子科技大学 | A kind of miniaturization broadband antenna suitable for 5G communication |
| CN107425278A (en) * | 2017-08-09 | 2017-12-01 | 华南理工大学 | The square slot ultra wideband antenna of coplanar wave guide feedback |
| CN107994326A (en) * | 2017-12-06 | 2018-05-04 | 北京华镁钛科技有限公司 | A kind of U wave band Broadband Circular Polarization Microstrip Antenna |
| CN107994326B (en) * | 2017-12-06 | 2023-10-27 | 北京华镁钛科技有限公司 | U-band broadband circularly polarized microstrip antenna |
| CN110474157A (en) * | 2019-08-27 | 2019-11-19 | 南京邮电大学 | A kind of mobile communication frequency range printed monopole antenna |
| CN111276808A (en) * | 2020-03-12 | 2020-06-12 | 南京理工大学 | Omnidirectional ultra-wideband antenna |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202616407U (en) | Ultra-wideband antenna of integrated polygonal resonant cavity | |
| Chu et al. | A compact notched band UWB slot antenna with sharp selectivity and controllable bandwidth | |
| CN204167480U (en) | Single trap UWB antenna that a kind of bent spurious element loads | |
| CN202839954U (en) | Notch ultra-wideband antenna with parasitic elements | |
| CN102064384A (en) | Ultra-wideband antenna | |
| Chu et al. | A compact ultrawideband antenna with 3.4/5.5 GHz dual band-notched characteristics | |
| CN205122771U (en) | Microstrip antenna | |
| CN103199339B (en) | Reactance loaded dual-band antenna | |
| CN101888016A (en) | Ultra wide band antenna with trap characteristic | |
| CN201904436U (en) | Ultra-broadband antenna with trap characteristic | |
| Wen et al. | A low-profile wideband antenna with monopolelike radiation characteristics for 4G/5G indoor micro base station application | |
| CN106785463A (en) | A kind of single trap ultra-wideband monopole antenna | |
| CN102110899A (en) | Ultra broadband antenna of integrated filter | |
| CN102299420A (en) | Annular multiple-wave-trap ultra-wideband antenna | |
| CN203260725U (en) | Novel ultra-wide band antenna with groove in shape of Chinese character shan and symmetric resonator structure | |
| CN206349513U (en) | A kind of single trap ultra-wideband monopole antenna | |
| CN102299419A (en) | UWB (ultra-wideband) antenna based on Cantor set fractal structure | |
| CN109672020A (en) | A kind of double trap flexible antennas of the ultra wide band of coplanar wave guide feedback | |
| CN201975513U (en) | Ultra wide band antenna of integrated filter | |
| CN202333130U (en) | Annular multi-trap UWB antenna | |
| CN203056094U (en) | Coplanar waveguide UWB (Ultra Wide Band) antenna with notch characteristics | |
| CN104953288A (en) | Small UWB (ultra-wideband) antenna with band-notch characteristics in multiple frequency bands | |
| Li et al. | Miniaturization of ACS-fed dual-band antenna with loaded capacitance terminations for WLAN applications | |
| CN102136625A (en) | Ultra-wideband antenna with band-notched characteristic | |
| CN101777691A (en) | Slot printing monopole ultra-wideband antenna |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121219 Termination date: 20150508 |
|
| EXPY | Termination of patent right or utility model |