CN1034095A - Wide frequency band loop parasific array antenna - Google Patents
Wide frequency band loop parasific array antenna Download PDFInfo
- Publication number
- CN1034095A CN1034095A CN 87101192 CN87101192A CN1034095A CN 1034095 A CN1034095 A CN 1034095A CN 87101192 CN87101192 CN 87101192 CN 87101192 A CN87101192 A CN 87101192A CN 1034095 A CN1034095 A CN 1034095A
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- China
- Prior art keywords
- loop
- parasific
- antenna
- array antenna
- feed
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- Aerials With Secondary Devices (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
Wide frequency band loop parasific array antenna belongs to a kind of parasific array antenna, and its feed element is a wide-angle triangle profile dipole, and parasitic element is the double triangle loop.So the three element loop parasific array antenna working band width of forming by a feed element, reflector element and dricetor element reach 2: 1～4: 1.The four element loop parasific array antenna working band width that so have two directors reach 1.5: 1～and 1.7: 1.The remarkable advantage of antenna of the present invention is that working band is wide and it linear content is little.Be suitable for broadband reception antenna as the communicating by letter of metric wave wave band (VHF) and decimeter wave wave band (UHF), TV and broadcast system and equipment.Be particularly suitable for as television receiving antenna.
Description
The present invention is a kind of parasific array antenna, and its feed element is a wide-angle triangle profile dipole, and parasitic element is the double triangle loop.The bandwidth of operation of this three element loop parasific array antennas of being made up of the dricetor element of the reflector element of a feed element and a parasitism and a parasitism can reach 2: 1-4: 1.This antenna of making of linear conductor can be used as metric wave (VHF) wave band (30-300MH
z) and decimeter wave (UHF) wave band (300-3300MH
z), the broadband reception antenna of communication TV and broadcast system and equipment is particularly suitable for as VHF-FM TV and FM reception antenna or VHF-UHF full channel tv receiving antenna etc.
The most frequently used VHF and UHF wave band television receiving antenna are to use cylindricality half-wave dipole or annular folded dipole as feed element, the cylindricality parasitic element is as the Yagi antenna of parasitic element, it belongs to parasific array antenna in the classification of antenna, the bandwidth of operation of the rectangle column monopole Yagi antenna of process good design can only reach about 10%, the television reception that can only be used for several adjacent channels of the single channel television reception of VHF wave band or UHF wave band, done multiple effort in the hope of widening the bandwidth of operation of Yagi antenna in five times more than ten years after Yagi antenna comes out, these effort can be summed up as: (1) uses the double frequency composite oscillator as feed element, (2) adopt square or circular loop or cross oscillator as feed element and (or) parasitic element, the result can widen the working band of Yagi antenna to a certain extent, but all can not reach 2: 1 bandwidth of operation.The parasific array antenna that only has that up to the present can reach the bandwidth of operation about 1: 1 is that Japanese scholar T.Tsukiji and S.Tou delivered (T.Tsukiji and S.Tou in 1981, " High gain and broad Yagi-Uda array antenna composed of twin-delta loops; " in Antennas and Propagation, IEE Conference Publication Number 169, PP.438-441,1981.).The two equilateral equilateral triangle loop that their suggestion is used in two public vertex feeds is as feed element, with having two equilateral triangles loop (being called the double triangle loop) of a public vertex as reflector element or dricetor element.Requiring the girth in a triangle loop when as reflector element is 1.0-2.0 λ, and λ is the antenna operation wavelength, and Unit two of making like this (feed element and a reflector element) parasific array antenna bandwidth of operation can reach 2: 1.Requiring the girth in a triangle loop when as dricetor element is 0.5-0.9 λ, the bandwidth of operation of Unit two of making like this (feed element and a dricetor element) parasific array antenna was slightly less than 2: 1, they do not study Unit three (feed element, a reflector element and a dricetor element) situation, to increase the benefit that a dricetor element brings very little having on two cellular constructions of reflector element according to our calculating, gain increases by 1 decibel of less than, but bandwidth has suitable loss, in fact, because the size in desired double triangle loop is quite big, this parasitic array structure that Tsukiji and Tou advised also fails to form a kind of antenna of supporting practical application.
At present, practical antenna with the VHF of broadband operation characteristic and UHF wave band is the later stage fifties by the logarithmically periodic dipole array antenna of people's inventions such as the Du Hamel of U.S. University of Illinois and Isbell, adopts cylindricality metric wave dipole or its distortion as the unit usually.The bandwidth that reaches about 4: 1 of antenna is not difficult like this.But its operation principle is different from Yagi antenna, and its feeding classification is not parasitic, but inverted phase type feed in parallel.
The object of the present invention is to provide a kind of simple in structure and the VHF that yardstick is little and all channel antenna of UHF wave band, its bandwidth of operation can satisfy the requirement that the frequency range all-channel tv receives of striding of topped VHF TV all-channel or VHF-UHF substantially up to 4: 1.
Broadband parasific array antenna of the present invention is called the double triangle loop parasific array antenna of triangle profile dipole feed, its basic structure is three cellular constructions such as Fig. 3, feed element adopts triangle profile dipole to see Fig. 1, and reflector element and dricetor element all adopt the double triangle loop to see Fig. 2.When the girth of a conductor circuit is slightly larger than wavelength, be reflector as the effect in this loop of parasitic element.See Fig. 2 when the double triangle on paired top is done in this loop, one of them leg-of-mutton girth only is slightly larger than 0.5 λ
1, λ here
1Be three unit parasitic loop antenna working band lower bounds wavelength frequently.Subtended angle is 50 °-70 ° a wide-angle, and triangle profile dipole is the line dipole structure with broadband impedance operator, and for example, when choosing subtended angle and be 60 °, its a leg-of-mutton girth of one pole is about 0.51 λ
2, λ here
2Be first resonance wavelength of dipole.Because triangle profile dipole is similar to the shape in double triangle loop, good coupling is arranged, if choose λ between them
2Suitably less than λ
1, as feed element, two equilateral triangles loop just can be at λ as the two unit parasitic array that reflector element constituted with equilateral triangle profile dipole
1＞λ＞λ
3Operating wavelength range in produce by the directed radiation of reflector to the feed element direction, λ here
3Be the lower bound of operation wavelength, λ
3＜λ
2Add in feed element the place ahead that again the triangle girth is slightly less than 0.5 λ
3Two equilateral triangles loop as dricetor element, can make gain that suitable raising is arranged, the operation principle of the double triangle loop passive antenna of Here it is three unit equilateral triangle profile dipole feeds.Near the drift angle of each unit intermediate cam shape other angles also can 60 ° have similar relation between three unit.Accurate relation between the size of each unit and the performance of spacing between the unit and antenna need rely on and calculate.
For the passive antenna structure of being considered, can derive the integral equations of determining CURRENT DISTRIBUTION on the antenna by Theory of Electromagnetic Field under the given situation of feed source, the numerical solution of obtaining integral equations with moment method can draw the CURRENT DISTRIBUTION on the lead, thereby can try to achieve the radiation characteristic of antenna.Required evaluation work is finished on computers, and the result shows that this three unit parasitic array structures can be designed to all channel antenna of bandwidth of operation between 2: 1 to 4: 1.If increase a director for above-mentioned three cellular constructions, it is 1.5: 1 to 1.7: 1 all channel antenna that the four unit parasitic array structures that constituted can be designed to bandwidth of operation.When being 10 with diameter
-3λ
1Thin wire when making, bandwidth is that 4: 1 three unit parasific array antenna gains can reach the 4.5-9.5 decibel, bandwidth is that 1.5: 1 four unit parasific array antenna gains reach the 7.1-9.5 decibel, except that bandwidth of operation, another remarkable advantage of loop of the present invention passive antenna is that it linear content is little, for example, the length and width yardstick of the three-element aerial of 4: 1 bandwidth only is 0.12 λ
1* 0.30 λ
1, the logarithmically periodic dipole array antenna that gains close with having same bandwidth compares, and the reduction of its length and width yardstick is about 40%-50%, and the input impedance of antenna can be by suitably selecting feed crack g
2Size regulate to such an extent that coupling is arranged preferably with 300 ohm of feeder lines, so be particularly suitable for as television receiving antenna.4: 1 bandwidth of operation of three unit parasific array antennas can satisfy the requirement of low section (13-33 channel) of the high section of VHF (6-12 channel) of the VHF frequency range of topped TV and FM broadcasting (FM) or topped TV and uhf band substantially.
Most preferred embodiment of the present invention is as follows:
One can topped TV the high section of VHF frequency range and the VHF-UHF all-channel three element loop parasific array antennas of the low section of uhf band (6-33 channel) have following physical dimension:
l
1＝544mm l
2＝384mm l
3＝126mm
h
1＝334mm h
2＝210mm h
3＝92mm
d
1＝148mm d
2＝61mm
g
1＝g
3＝28mm g
2＝20mm
Aluminum pipe with φ 6 is made operating frequency 167-680MH
z, bandwidth 4.07: 1 is the 4.5-6.7 decibel at the 6-12 channel gain, is the 5.7-9.5 decibel in 13-33 channel gain value, antenna is connected to television set with 300 ohm of feeder lines through 4: 1 impedance transformers.Antenna size is little, can be used as domestic aerial and uses.
The Figure of description explanation:
Fig. 1 is a triangle profile dipole
Fig. 2 is the double triangle loop
Fig. 3 is the double triangle loop passive antenna of three unit triangle profile dipole feeds, and F is a distributing point
Claims (3)
1, the three element loop parasific array antennas a kind of by feed element, that parasitic reflector element and parasitic dricetor element are formed is characterized in that feed element is a wide-angle triangle profile dipole, and parasitic reflector element and dricetor element are the double triangle loop.
2, a kind of by feed element, the four element loop parasific array antennas that parasitic reflector element and parasitic dricetor element are formed, it is characterized in that feed element is a wide-angle triangle corridor line dipole, the dricetor element of the reflector element of a parasitism and two parasitisms is the double triangle loop.
3, according to two equilateral triangles three unit VHF-UHF band loop parasific array antennas of the described equilateral triangle profile of claim 1 dipole feed, its physical dimension is:
l
1＝544mm l
2＝384mm l
3＝126mm
h
1＝334mm h
2＝210mm h
3＝92mm
d
1＝148mm d
2＝61mm
g
1＝g
3＝28mm g
2＝20mm
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN87101192.1A CN1005299B (en) | 1987-12-19 | 1987-12-19 | Wide-band loop parasitic array antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN87101192.1A CN1005299B (en) | 1987-12-19 | 1987-12-19 | Wide-band loop parasitic array antenna |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1034095A true CN1034095A (en) | 1989-07-19 |
| CN1005299B CN1005299B (en) | 1989-09-27 |
Family
ID=4813238
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN87101192.1A Expired CN1005299B (en) | 1987-12-19 | 1987-12-19 | Wide-band loop parasitic array antenna |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1005299B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104377455A (en) * | 2013-08-14 | 2015-02-25 | 启碁科技股份有限公司 | Antenna structure |
| CN104993245A (en) * | 2015-06-25 | 2015-10-21 | 常州吉赫射频电子技术有限公司 | S-waveband communication-in-motion double-frequency circularly polarized micro-strip antenna and array thereof |
| CN114944549A (en) * | 2022-05-20 | 2022-08-26 | 显踪电子(苏州)有限公司 | Ultra-wideband communication omni-directional stable antenna unit, antenna array and antenna |
-
1987
- 1987-12-19 CN CN87101192.1A patent/CN1005299B/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104377455A (en) * | 2013-08-14 | 2015-02-25 | 启碁科技股份有限公司 | Antenna structure |
| CN104993245A (en) * | 2015-06-25 | 2015-10-21 | 常州吉赫射频电子技术有限公司 | S-waveband communication-in-motion double-frequency circularly polarized micro-strip antenna and array thereof |
| CN114944549A (en) * | 2022-05-20 | 2022-08-26 | 显踪电子(苏州)有限公司 | Ultra-wideband communication omni-directional stable antenna unit, antenna array and antenna |
| CN114944549B (en) * | 2022-05-20 | 2024-02-13 | 显踪电子(苏州)有限公司 | Ultra-wideband communication omnidirectional stable antenna unit, antenna array and antenna |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1005299B (en) | 1989-09-27 |
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| CF01 | Termination of patent right due to non-payment of annual fee |