CN103165972A - Circularly polarized antenna - Google Patents
Circularly polarized antenna Download PDFInfo
- Publication number
- CN103165972A CN103165972A CN2011104185836A CN201110418583A CN103165972A CN 103165972 A CN103165972 A CN 103165972A CN 2011104185836 A CN2011104185836 A CN 2011104185836A CN 201110418583 A CN201110418583 A CN 201110418583A CN 103165972 A CN103165972 A CN 103165972A
- Authority
- CN
- China
- Prior art keywords
- primary radiation
- radiation sheet
- polarized antenna
- current potential
- perturbation
- 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.)
- Granted
Links
Images
Landscapes
- Waveguide Aerials (AREA)
Abstract
Provided is a circularly polarized antenna. The circularly polarized antenna comprises a grounding part, main radiation pieces, two equal perturbation pieces and an entry unit which is used for transmitting signals. The main radiation pieces are overlapped on the grounding part at intervals, the two equal perturbation pieces protrude out from the peripheries of the main radiation pieces at intervals and are divided into two substantially first straight line rows which are symmetrical in structures along the main radiation pieces, the entry unit comprises a first electric potential part and a second electric potential part, the first electric potential part is connected with the grounding part in an electric mode, and the second electric potential part is connected with the main radiation pieces in an electric mode. Through the configuration of the equal perturbation pieces, equal resonance modes which are substantially vertical in two equal polarization directions can be resonated by the main radiation pieces, and the phase positions of the equal resonance modes are enabled to substantially differ by 90 degrees through adjusting the length of the equal perturbation pieces, and thus circular polarization can be achieved.
Description
Technical field
The invention relates to a kind of antenna, refer to especially a kind of single feed-in Broadband circularly polarized antenna.
Background technology
Along with wireless radio-frequency (RFID) popularizing gradually in logistical applications, the transmitting-receiving goods no longer needs complicated manpower checking and counting, and also be able to quicker and correct with RFID Retrospect goods and statistics stock, and reducing greatly the too high or not enough keyholed back plate risk of stock, good errorless radio-frequency (RF) signal is received and dispatched and identification is basic but this advantage must be based upon.In the application of goods checking, circular polarized antenna more can overcome the interference of the imperfect environmental factors such as multi-path is poor compared to linearly polarized antenna, so be more suitable for the application as the RFID technology.
the circular polarized antenna design of general closed planar can be divided into single feed-in and double-fed enters dual mode, the mode of this list feed-in such as paper " Circularly polarized microstrip antenna with a tuning stub, " Electron. Lett., vol. 34, pp. 831-832, April 30, 1998. in grooving seam or the design that adds in addition single metal perturbation sheet can reach circular polarization in the radiation sheet metal of mentioned antenna in a single-layer medium substrate design, but this kind design have 3dB axial ratio (axial ratio) frequency range partially narrow (less than the linearized radiation frequency range 1/3rd) shortcoming, and, because the metal perturbation sheet of this kind antenna or the number of the line of rabbet joint are only all single, and the frequency range of this kind antenna is partially narrow, so as long as fine setting all can cause the significantly change of circular polarization radiation frequency band range to this perturbation sheet or the line of rabbet joint, and then the degree of difficulty when increasing design and stability and yield when reducing volume production.
so in order further to solve the aforesaid drawbacks, so a kind of double-fed as Republic of China's patent the 200926521st publication number enters circular polarized antenna and is suggested, though this kind design can solve the problem of circular polarization frequency range deficiency, and the percentage of the change that the band bending that larger frequency range characteristic causes for slightly variation on antenna structure or frequency range change is just lower, and the stability of increase practical application and the yield of volume production, but entering circular polarized antenna, this kind double-fed can cause extra power loss because of circuit such as the Wilkinson power divider (Wilkinson power divider) of its use or branch road couplers (branch-line coupler), complexity and the volume production cost of design.
Summary of the invention
Therefore, the purpose of this invention is to provide a kind of circular polarized antenna design that larger frequency range can be provided and need not additional circuit.
So circular polarized antenna of the present invention comprises grounding parts, primary radiation sheet, two perturbation sheets and in order to the feed-in unit of transmitting signals.
This primary radiation sheet compartment of terrain is overlapped on this grounding parts.These perturbation sheets protrude and along this primary radiation sheet being divided into two the first linear array of symmetrical structure substantially from the periphery of this primary radiation sheet at intervals.This feed-in unit comprises the first current potential section and the second current potential section, and this first current potential section is electrically connected on this grounding parts, and this second current potential section is electrically connected on this primary radiation sheet.By the configuration of these perturbation sheets, this radiating element polarization direction vertical resonance mode substantially that can resonate out, and make the phase place of these resonance modes differ substantially 90 degree by the length of adjusting these perturbation sheets again, can reach circular polarization operation.
Effect of the present invention still can have the characteristic of broadband and volume production stability for a kind of broadband being provided and being the circular polarized antenna of single feed-in type under the situation of not extra circuits design.
Description of drawings
Fig. 1 is the stereogram of the preferred embodiment of circular polarized antenna of the present invention, illustrates that the primary radiation sheet is for circular;
Fig. 2 is the plane graph of this preferred embodiment, illustrates that this primary radiation sheet is annular;
Fig. 3 is the plane graph of this preferred embodiment, illustrates that this primary radiation sheet is square;
Fig. 4 is the plane graph of this preferred embodiment, illustrates that this primary radiation sheet is side's annular;
Fig. 5 is the reflection loss figure of this preferred embodiment simulation;
Fig. 6 is the Smith chart of this preferred embodiment simulation;
Fig. 7 is the variation diagram of the axial ratio value simulated in frequency band of this preferred embodiment; And
Fig. 8 is the antenna gain variation diagram of this preferred embodiment emulation in this frequency band.
Embodiment
About aforementioned and other technology contents, characteristics and effect of the present invention, in the following detailed description that coordinates with reference to graphic preferred embodiment, can clearly present.
Consult Fig. 1 to Fig. 4, it is the preferred embodiment of circular polarized antenna of the present invention, the circular polarized antenna of this embodiment is applied in the frequency of operation of 920 MHz, comprise grounding parts 1, primary radiation sheet 2, two perturbation sheets 3, the first coupling protuberances 4, the second coupling protuberance 5, and in order to the feed-in unit 6 of transmitting signals.
This grounding parts 1 is for metal material and be formed at the surface 71 of first substrate 7, and this primary radiation sheet 2 is for metal material and be formed at the surface 81 of second substrate 8, and this second substrate 8 compartment of terrains are overlapped on this first substrate 7.This first substrate 7 and this second substrate 8 are glass mat (FR4) in the present embodiment, but can be also other non-conductor material that other kind can support this primary radiation sheet 2 and this grounding parts 1 during practical application, or there is no this first substrate 7 and second substrate 8 and otherwise fix this primary radiation sheet 2 and this grounding parts 1.The shape of this primary radiation sheet 2 except circle shown in Figure 1, can be also annular as shown in Figure 2, side's annular square or shown in Figure 4 shown in Figure 3.
These perturbation sheets 3 are at intervals from periphery 21 protrusions of this primary radiation sheet 2 and along this primary radiation sheet 2 being divided into two the first straight line L1 arrangements of symmetrical structure substantially.
This first coupling protuberance 4 and this second coupling protuberance 5 is in order to adjusting impedance matching, and this first coupling protuberance 4 is arranged along the second straight line L2 that this primary radiation sheet 2 is divided into two other symmetrical structure from the periphery 21 of this primary radiation sheet 2 respectively with this second coupling protuberance 5.
This feed-in unit 6 comprises the first current potential section 61 and the second current potential section 62, and this first current potential section 61 is electrically connected on this grounding parts 1, and this second current potential section 62 is electrically connected on this primary radiation sheet 2 via this first coupling protuberance 4.
This feed-in unit 6 comprises the sub-miniature A connector 6 ' of 50 ohm in the explanation of the present embodiment, and this first current potential section 61 has the screen 611 of this sub-miniature A connector 6 ', and this second current potential section 62 has the probe 621 of this sub-miniature A connector 6 '.The probe 621 of this sub-miniature A connector 6 ' is electrically connected on this primary radiation sheet 2 via this first coupling protuberance 4 non-contiguously with this grounding parts 1.
Configuration by these perturbation sheets 3, make this first straight line L1 and this second straight line L2 probably be the angle theta of positive 45 degree, this circular polarized antenna polarization direction vertical resonance mode substantially that can resonate out, and make the phase place of these resonance modes differ substantially 90 degree by the length of adjusting these perturbation sheets 3 again, can reach circular polarization operation.In addition, this Fig. 1 is designed to right-handed circular polarization (RHCP) antenna, but also can make right-handed circular polarization (RHCP) into left-hand circular polarization (LHCP) according to identical design concept, the angle theta that wherein only need change this first straight line L1 and this second straight line L2 gets final product for negative 45 degree.
Consulting Fig. 6 to Fig. 9, is the simulation result of the circular polarized antenna of Fig. 1.
Consulting Fig. 6, is the reflection loss figure of this circular polarized antenna.When the impedance frequency range of this antenna defined with reflection loss 10 dB, the impedance frequency range of this circular polarized antenna was 50 MHz (890 ~ 940 MHz).
Consulting Fig. 7, is the Smith chart (smith chart) of this circular polarized antenna.Can know that by the cusp A in figure this circular polarized antenna produces two resonance modes that frequency is adjacent really.
Consulting Fig. 8, is the axial ratio value of this circular polarized antenna in operational frequency bands.Frequency range when this axial ratio frequency range defines take 3dB is 21 MHz(907 ~ 928 MHz).So the circular polarization frequency range of the present embodiment (21 MHz) can reach 42 percent compared to linearized radiation frequency range (50 MHz), the 3dB axial ratio frequency range of comparing the circular polarized antenna of the single perturbation sheet of known single feed-in is only wide for 1/3rd of linearized radiation frequency range.
Consult Fig. 9, this circular polarized antenna is 100x100 mm in grounding parts 1 area
2The time, the radiation gain (gain) in this operational frequency bands is all higher than 8 dBi.
In sum, single feed-in circular polarized antenna that the present embodiment comprises two perturbation sheets 3 has wider Circular polarization ratio frequency range compared to single feed-in design of known single perturbation sheet, and the band bending percentage that causes can reduce its structural change the time, can exempt the path loss that power divider causes and improve radiation gain and reduce design complexities and the volume production cost compared to doubly-fed antenna, therefore really can reach purpose of the present invention.
Recited above is only preferred embodiment of the present invention, and can not limit scope of the invention process with this, be that every simple equivalence of doing according to the present patent application the scope of the claims and invention description content changes and revises, all still belong to the scope that patent of the present invention contains.
The component symbol explanation:
1 grounding parts
2 primary radiation sheets
21 peripheries
3 perturbation sheets
4 first coupling protuberances
5 second coupling protuberances
6 feed-in unit
6 ' sub-miniature A connector
61 first current potential sections
611 screens
62 second current potential sections
621 probes
L1 the first straight line
L2 the second straight line
Claims (6)
1. circular polarized antenna comprises:
Grounding parts;
Primary radiation sheet, compartment of terrain are overlapped on this grounding parts; And
Two perturbation sheets are at intervals from the periphery protrusion of this primary radiation sheet and along this primary radiation sheet being divided into the first linear array of two-phase symmetrical structure; And
In order to the feed-in unit of transmitting signals, comprise the first current potential section and the second current potential section, this first current potential section is electrically connected on this grounding parts, and this second current potential section is electrically connected on this primary radiation sheet,
By the configuration of these perturbation sheets, this radiating element resonance mode of polarization perpendicular direction that can resonate out, and make again phase phasic difference 90 degree of these resonance modes by the length of adjusting these perturbation sheets, thus can reach circular polarization operation.
2. circular polarized antenna according to claim 1, wherein, this primary radiation sheet is circle or annular.
3. circular polarized antenna according to claim 1, wherein, this primary radiation sheet is square or side's annular.
4. circular polarized antenna according to claim 1 also comprises adjusting the first coupling protuberance of impedance matching, and the second current potential section of this feed-in unit is electrically connected to this primary radiation sheet via this first coupling protuberance.
5. circular polarized antenna according to claim 4 also comprises from outward extending the second coupling protuberance of the periphery of this primary radiation sheet, this first coupling protuberance with this second mate protuberance respectively from the periphery of this primary radiation sheet along this primary radiation sheet being divided into the second linear array of two other symmetrical structure.
6. circular polarized antenna according to claim 1, wherein, this feed-in unit comprises the sub-miniature A connector of 50 ohm, and this second current potential section has the probe of this joint, and this first current potential section has the screen of this joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110418583.6A CN103165972B (en) | 2011-12-14 | 2011-12-14 | Circular polarized antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110418583.6A CN103165972B (en) | 2011-12-14 | 2011-12-14 | Circular polarized antenna |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103165972A true CN103165972A (en) | 2013-06-19 |
| CN103165972B CN103165972B (en) | 2016-03-23 |
Family
ID=48588844
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110418583.6A Expired - Fee Related CN103165972B (en) | 2011-12-14 | 2011-12-14 | Circular polarized antenna |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103165972B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104934699A (en) * | 2015-06-24 | 2015-09-23 | 深圳市华颖泰科电子技术有限公司 | Triple-frequency dual-polarized microstrip antenna |
| CN105990663A (en) * | 2015-01-30 | 2016-10-05 | 深圳光启尖端技术有限责任公司 | Antenna, antenna system and communication device |
| CN111786079A (en) * | 2020-08-04 | 2020-10-16 | 大连海事大学 | Single-feed circularly polarized RFID reader-writer antenna |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08250924A (en) * | 1995-03-08 | 1996-09-27 | Nippon Dengiyou Kosaku Kk | Electromagnetic coupling antenna |
| CN1412889A (en) * | 2001-10-19 | 2003-04-23 | 智邦科技股份有限公司 | Broad-band circular polarized plate antenna |
| CN1459931A (en) * | 2002-05-17 | 2003-12-03 | 智邦科技股份有限公司 | Bisingle polar antenna |
| TW200926521A (en) * | 2007-12-03 | 2009-06-16 | Advanced Connection Tech Inc | Circular polarization antenna |
-
2011
- 2011-12-14 CN CN201110418583.6A patent/CN103165972B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08250924A (en) * | 1995-03-08 | 1996-09-27 | Nippon Dengiyou Kosaku Kk | Electromagnetic coupling antenna |
| CN1412889A (en) * | 2001-10-19 | 2003-04-23 | 智邦科技股份有限公司 | Broad-band circular polarized plate antenna |
| CN1459931A (en) * | 2002-05-17 | 2003-12-03 | 智邦科技股份有限公司 | Bisingle polar antenna |
| TW200926521A (en) * | 2007-12-03 | 2009-06-16 | Advanced Connection Tech Inc | Circular polarization antenna |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105990663A (en) * | 2015-01-30 | 2016-10-05 | 深圳光启尖端技术有限责任公司 | Antenna, antenna system and communication device |
| CN104934699A (en) * | 2015-06-24 | 2015-09-23 | 深圳市华颖泰科电子技术有限公司 | Triple-frequency dual-polarized microstrip antenna |
| CN104934699B (en) * | 2015-06-24 | 2018-02-13 | 遵义市华颖泰科科技有限责任公司 | A kind of three frequency double polarized micro strip antennas |
| CN111786079A (en) * | 2020-08-04 | 2020-10-16 | 大连海事大学 | Single-feed circularly polarized RFID reader-writer antenna |
| CN111786079B (en) * | 2020-08-04 | 2021-08-31 | 大连海事大学 | Single-feed circularly polarized RFID reader-writer antenna |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103165972B (en) | 2016-03-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Tang et al. | A wideband differentially fed dual-polarized stacked patch antenna with tuned slot excitations | |
| CN102005645B (en) | Miniaturized dual-frequency antenna | |
| US8928544B2 (en) | Wideband circularly polarized hybrid dielectric resonator antenna | |
| Shen et al. | A novel bidirectional antenna with broadband circularly polarized radiation in X-band | |
| CN202759017U (en) | Multi-frequency parasitic coupling antenna and radio communication apparatus possessing coupling antenna | |
| Banerjee et al. | A CPW-fed compact monopole antenna with defected ground structure and modified parasitic hilbert strip having wideband circular polarization | |
| CN103515700B (en) | A kind of RFID antenna | |
| CN111355027B (en) | Self-decoupling antenna array | |
| Fu et al. | A compact planar Moxon‐Yagi composite antenna with end‐fire radiation for dual‐band applications | |
| CN103165972B (en) | Circular polarized antenna | |
| TWI496350B (en) | Circular polarized antenna | |
| Li et al. | A wideband twin-diamond-shaped circularly polarized patch antenna with gap-coupled feed | |
| JP2007142974A (en) | Thin planar antenna | |
| CN114614249B (en) | Broadband circularly polarized magneto-electric dipole transmission array antenna | |
| Son et al. | Design of a circularly polarised radio-frequency identification reader antenna with high return loss | |
| Li et al. | Dual-polarised monopole-slot co-located MIMO antenna for small-volume terminals | |
| CN104681969A (en) | Hybrid radiator antenna structure | |
| Farran et al. | Microstrip-fed quasi-Yagi antennas for WLAN applications | |
| CN108539428A (en) | A kind of Broadband circularly polarized antenna of omnidirectional radiation | |
| Tahseen et al. | A triple band dual-polarized multi-slotted antenna array for base station applications | |
| Ramanandraibe et al. | A half-loop antenna associated with one SRR cell | |
| Kahar et al. | A slotted circular patch antenna with wideband filtering characteristics | |
| Islam et al. | Wideband circularly polarized CPW fed antenna for bluetooth applications | |
| CN219677561U (en) | Large-frequency-ratio-width double-frequency 5G antenna | |
| Choi et al. | An internal modified rectangular loop antenna for DVB‐H applications |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| 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: 20160323 Termination date: 20171214 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |