CN104538733B - A kind of logarithm period element antenna for loading rectangle coupled resonators - Google Patents
A kind of logarithm period element antenna for loading rectangle coupled resonators Download PDFInfo
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Abstract
The invention belongs to communication technical field, specially a kind of logarithm period element antenna for loading rectangle coupled resonators.The antenna includes a secondary logarithm period element antenna array, a secondary rectangle coupled resonators array, an input port；Dielectric-slab front has：Logarithm period layered transducer elements, rectangle coupled resonators array, a ribbon feeder, the wherein position of rectangle coupled resonators are corresponding with the oscillator position at the back side, form couple feed；Dielectric-slab reverse side has：Logarithm period layered transducer elements, rectangle coupled resonators array, a ribbon feeder, its structure are symmetric with the front of dielectric-slab；There is a ribbon feeder at dielectric-slab center.By the way of rectangle coupled resonators array is loaded on traditional log-periodic antenna, the characteristic of frequency band, low cut-off frequency and volume compact is widened in realization to the present invention.
Description
Technical field
The invention belongs to communication technical field, and in particular to a kind of logarithm period element antenna for being loaded with new structure.
Background technology
Log-periodic antenna is proposed in nineteen fifty-seven, is a kind of wide band frequency-independent antenna, and its basic thought is antenna
By a certain scale factorStill equal to its original structure after conversion, then the frequency of antenna isWithShi Xingneng is identical.Because it
With frequency band and simple structure wider, so being widely used in a variety of applications rapidly in many fields.
The main Types of log-periodic antenna have Log Periodic Dipole Antenna and unipole antenna, logarithm period resonance V-arrangement day
The forms such as line, logarithm period helical antenna, wherein most common is Log Periodic Dipole Antenna.It can be used for point-to-point logical
Letter, it is also possible to determined for scientific and technological digital signal, it is widely used, such as cable television antenna, radio signals are received, send
The scientific and technological signal of digital base stations, and actinometry facility radar effectiveness etc., also can be used as short wave communication antenna and medium wave, short
The broadcast transmitting antenna of ripple.
The present invention is carried out on the basis of traditional Log Periodic Dipole Antenna.
The current study hotspot of Log Periodic Dipole Antenna be concentrated mainly on by change the structure of its low frequency end oscillator come
Increase bandwidth and reduce lower limiting frequency, this is because the oscillator of Log Periodic Dipole Antenna is by a certain scale factorInto etc.
Ratio change, when cut-off frequency is relatively low, the size of antenna is larger, to processing and using bringing inconvenience.Adjustment low frequency end
The shape and size of oscillator are to improve its low frequency performance at present, expand the main method of bandwidth, such as rectangle, folding oscillator, three
It is angular, or increase fluting or corner cut etc. on oscillator or feeder line.
The invention belongs to the new method of the research direction of being different from over.
Found through the literature search to prior art, the patent " wide-band printing of Fu Jiahui of Harbin Institute of Technology et al.
Diminishing Dimension of Log-Periodic Dipole Antenna "（CN104092011A）, be changed to for the structure of oscillator by the antennaShape and chevron, to increase its electricity
Length；Dimitris E. Anagnostou et al. were in the IEEE ANTENNAS AND WIRELESS of volume 7 in 2008
PROPAGATION LETTERS（Antenna and it is wirelessly transferred）On delivered " A Printed Log-Periodic Koch-
Dipole Array （LPKDA）”（A kind of printed log-periodic antenna of loading Ke Ke oscillators）", the impedance bandwidth of the antenna is covered
Lid 1.90-3.2GHz, reduces the area of antenna 17%.Through research, the method that they are used is the shape for changing antenna oscillator
Shape, and set forth herein loading new structure rectangle coupled resonators array（Complementary split ring Complementary
Split-Ring Resonator）Method, expanded by the innovation mode of research different from the past bandwidth and reduce volume,
The traditional log-periodic antenna frequency band for using herein is 0.6-1.8GHz（3：1）, frequency after loading rectangle coupled resonators array
Band is 0.4-1.8GHz（4.5:1）, wherein minimum cutoff is by first pair（Maximum a pair）Rectangle coupled resonators（5、
14）Size determine that lowest resonant frequency formula is（The light velocity/[4 ×（Distance center distance+long+wide）], and whole frequency domain
Interior radiation is then by adjusting the scale factor of rectangle coupled resonators arrayRealize.Meanwhile, further research can be tied
The log-periodic antenna of non-traditional oscillator is closed, such as rectangle coupled resonators battle array is loaded on the log-periodic antenna of Ke Ke oscillators
Row, to combine the advantage of the two.
The content of the invention
Present invention aim on the basis of log-periodic antenna design is not changed, there is provided a kind of rectangle for loading
Coupled resonators, the volume of antenna is not increased while the cut-off frequency of antenna is reduced, and makes it than possessing bigger band originally
Logarithm period element antenna wide.
The present invention provide bandwidth broadning Log Periodic Dipole Antenna, cover 0.4-1.8GHz frequency ranges, while possess compared with
Small size（Such as it is 300mm × 368mm）.Structure of the present invention is based on traditional logarithm period element antenna, by each pair logarithm
The back side opposite position loading rectangle coupled resonators array of periodic dipole oscillator, while reaching increase bandwidth and not increasing body
Long-pending purpose.Specifically, the present invention provide loading new structure logarithm period element antenna, its structure as shown in Figure 1, Figure 2,
Shown in Fig. 3, Fig. 4 and Fig. 5.Including a dielectric-slab 1 for playing a supportive role, an input port 23, the front of the dielectric-slab 1
Have：First transmission line unit 25, the first logarithm period layered transducer elements 4, the first rectangle coupled resonators array 5,7,9,11,13,
15th, 17,19,21, short-circuit end line 3, wherein：
One end of first transmission line unit 25 and input port 23 connect, and the other end and short-circuit end line 3 connect, the first logarithm
The transmission line unit 25 of periodic oscillator array 4 and first connects；First logarithm period layered transducer elements 4 take traditional log-periodic antenna
Design, its length, width and spacing with oscillator sequence number increase and reduce in proportion, its scale factor is；First rectangle coupled resonators array 5,7,9,11,13,15,17,19,21 is centrally located at corresponding first logarithm
The symmetric position at the center of periodic oscillator array 4, with the shortening of logarithm period oscillator length, its length and width are shortened by grade ratio, its
Size constant in proportionInto waiting than change, this factor is the arithmetic square root of logarithm period oscillator, and its reason is
When resonant frequency is relatively low, the resonance point narrower bandwidth corresponding to each pair oscillator, increaseAntenna can be made in whole frequency domain
Resonance, resonator array keeps constant with the distance of the first transmission line unit 25；
The reverse side of dielectric-slab 1 has：Second transmission line unit 24, the second logarithm period layered transducer elements 2, the coupling of the second rectangle are humorous
Shake device array 6,8,10,12,14,16,18,20,22, wherein：
The transmission line unit 24 of input port 23 and second connects, the second logarithm period layered transducer elements 2 and the second transmission line list
Unit 24 connects；Second logarithm period layered transducer elements 2 take the design of traditional log-periodic antenna, its size and the first logarithm
Periodic oscillator array 4 is identical, and position is in a center of symmetry with the first major axis of the logarithm period layered transducer elements 4 on dielectric-slab 1；Second
The size of rectangle coupled resonators array 6,8,10,12,14,16,18,20,22 and the first rectangle coupled resonators array 5,7,
9th, 11,13,15,17,19,21 is identical, and position is closed with the first rectangle coupled resonators array 5,7,9,11,13,15,17,19,21
It is in a center of symmetry in the major axis of dielectric-slab 1；
There are the 3rd transmission line unit 26, one end of the 3rd transmission line unit 26 and the phase of input port 23 in the center of dielectric-slab 1
Connect, the other end and short-circuit end line 3 connect；
Input port 23 respectively with the first transmission line unit 24, the second transmission line unit 25, the phase of the 3rd transmission line unit 26
Connection, the wherein signal end of input port 23 and the 3rd transmission line unit 26 connect, the ground of input port 23 and the first transmission line
Unit 24, the second transmission line unit 25 are connected；The two ends of short-circuit end line 3 respectively with the first transmission line unit 24 and the 3rd transmission line
Unit 26 is connected；First rectangle coupled resonators array 5,7,9,11,13,15,17,19,21 and the second logarithm period oscillator
Array 2 is located at the same position of the positive and negative of dielectric-slab 1；Second rectangle coupled resonators array 6,8,10,12,14,16,18,20,
22 and first logarithm period layered transducer elements 4 be located at the same position of the positive and negative of dielectric-slab 1.
First rectangle coupled resonators array 5,7,9,11,13,15,17,19,21 and the second rectangle coupled resonators array
6th, 8,10,12,14,16,18,20,22, the structure of wherein each unit is identical, and according to sequence number, its size presses a proportionality constantChange into ratio is waited；By taking rectangle coupled resonators array 5 as an example, etched by rectangle resonance blade unit 27
First C-channel line unit 28, the second C-channel line unit 29 are obtained.
In the present invention, the first described rectangle coupled resonators array 5,7,9,11,13,15,17,19,21 and the second square
The size of shape coupled resonators array 6,8,10,12,14,16,18,20,22 and relative first transmission line unit 24, second are transmitted
The position of line unit 25 is adjustable；The first described rectangle coupled resonators array 5,7,9,11,13,15,17,19,21 and
In the structure of two rectangle coupled resonators arrays 6,8,10,12,14,16,18,20,22, the first C-channel line unit 28 and the 2nd C
The length of shape line of rabbet joint unit 29 and wide adjustable, and the length of the first C-channel line unit 28 and wide should be respectively greater than the second C-channel line
The length and width of unit 29, the line of rabbet joint width of the two should be identical, and line of rabbet joint width is adjustable.
In the present invention, described short-circuit end line 3, the first logarithm period layered transducer elements 4, the second logarithm period layered transducer elements 2,
First transmission line unit 25, the second transmission line unit 24, the 3rd transmission line unit 26 and the first rectangle coupled resonators array 5,
7th, the rectangle in the 9,11,13,15,17,19,21, second rectangle coupled resonators array 6,8,10,12,14,16,18,20,22
Resonance blade unit 27 is conductor.
In the present invention, described the first C-channel line unit 28 and the second C-channel line unit 29 is all in the coupling of the first rectangle
The 5,7,9,11,13,15,17,19,21, second rectangle coupled resonators of resonator array array 6,8,10,12,14,16,18,
20th, etching removes corresponding seam shape on 22, and the air element structure for being formed.
In the present invention, the described outer signal source of input port unit 23, additional pumping signal passes through the 3rd transmission line
Unit 26, short-circuit end line 3, the first transmission line unit 25, the second transmission line unit 24, the first logarithm period layered transducer elements 4, second
Logarithm period layered transducer elements 2, then by the first logarithm period layered transducer elements 4, the second logarithm period layered transducer elements 2 and the first rectangle
The 5,7,9,11,13,15,17,19,21, second rectangle coupled resonators of coupled resonators array array 6,8,10,12,14,16,
18th, 20,22 coupling, realizes the feed to antenna；By adjusting the 3rd transmission line unit 26, short-circuit end line 3, the first transmission line
Unit 25, the second transmission line unit 24, the first logarithm period layered transducer elements 4, the size of the second logarithm period layered transducer elements 2, with
And the first logarithm period layered transducer elements 4, the second logarithm period layered transducer elements 2 and the first rectangle coupled resonators array 5,7,9,
11st, the size of the 13,15,17,19,21, second rectangle coupled resonators array 6,8,10,12,14,16,18,20,22 and position
And both relative positions and shape, realize expanding its low frequency bandwidth, reduce the purpose of cut-off frequency and compression volume.
In the present invention, described the first transmission line unit 25, the second transmission line unit 24, the 3rd transmission line unit 26 are all
50Uniform transmission line.
In the present invention, described dielectric-slab 1, its dielectric constant is 4.4, and thickness is 2.4mm.
The present invention loads rectangle coupled resonators array on traditional log-periodic antenna, is shaken with traditional logarithm period dipole
Sub-antenna is compared, and by loading resonator, with coupling feed way, improves the profit of vacant area in traditional log-periodic antenna
With rate, so as to increased bandwidth；Rectangle resonator provides longer current path, compared with traditional, is gathered around under same size
It is smaller when having a lower cut-off frequency, i.e. identical cut-off frequency.Traditional antenna is right by careful adjustment dipole element
Number, position and scale factor realize broadband performance, and on this basis, the present invention is by carefully adjustment rectangle coupled resonators battle array
The size of row and position and their relative positions with logarithm dipole antenna, are capable of achieving bigger bandwidth（0.4-1.8GHz, i.e.,
4.5 octaves）Lower cut-off frequency, or possess smaller size, as a comparison, prototype antenna in same band
In same size, minimum cutoff is 0.6GHZ.
Brief description of the drawings
Fig. 1 is the structural representation of the logarithm period element antenna totality of present invention loading new structure.
Fig. 2 is the reverse structure schematic of the logarithm period element antenna of present invention loading new structure.
Fig. 3 is the positive structure schematic of the logarithm period element antenna of present invention loading new structure.
Fig. 4 is the division center schematic diagram of the logarithm period element antenna of present invention loading new structure.
Fig. 5 is the rectangle coupled resonators schematic diagram of the logarithm period element antenna of present invention loading new structure.
Fig. 6 is the frequency characteristic schematic diagram of the logarithm period element antenna emulation of present invention loading new structure.
Fig. 7 is the H faces directional diagram schematic diagram of the logarithm period element antenna emulation of present invention loading new structure.
Fig. 8 is the E faces directional diagram schematic diagram of the logarithm period element antenna emulation of present invention loading new structure.
Specific embodiment
Embodiments of the invention are elaborated below in conjunction with the accompanying drawings：The present embodiment is with technical solution of the present invention as preceding
Put and implemented, give detailed implementation method and specific operating process, but protection scope of the present invention is not limited to down
The embodiment stated.
As shown in figure 1, the present embodiment includes：One dielectric-slab 1 for playing a supportive role, an input port 23, input
Mouth front respectively with dielectric-slab, reverse side are connected with center, wherein the signal connection of the center of dielectric-slab and input port, are situated between
The ground connection of the positive and negative and input port of scutum.
As shown in Fig. 2 the front of the dielectric-slab 1 described in the present embodiment has：First transmission line unit 25, the first logarithm period
Layered transducer elements 4, the first rectangle coupled resonators array 5,7,9,11,13,15,17,19,21, short-circuit end line 3.First transmission line
One end of unit 25 and input port 23 connect, and the other end and short-circuit end line 3 connect, the first logarithm period layered transducer elements 4 and the
One transmission line unit 25 connects；First logarithm period layered transducer elements 4 take the design of traditional log-periodic antenna, its length
Degree, width and spacing reduce in proportion as oscillator sequence number increases, and its scale factor is；First rectangle is coupled
Resonator array 5,7,9,11,13,15,17,19,21 is centrally located at the right of the corresponding center of first logarithm period layered transducer elements 4
Claim position, with the shortening of logarithm period oscillator length, its length and grade ratio of pressing wide shorten, and its scale factor is, this factor is the arithmetic square root of logarithm period oscillator, and its reason is when resonant frequency is relatively low, often
To the resonance point narrower bandwidth corresponding to oscillator, increaseAntenna can be made in whole frequency domain interior resonance, resonator array and
The distance of one transmission line unit 25 keeps constant.
As shown in figure 3, the reverse side of the dielectric-slab 1 described in the present embodiment has：Second transmission line unit 24, the second logarithm period
Layered transducer elements 2, the second rectangle coupled resonators array 6,8,10,12,14,16,18,20,22.Input port 23 and second is transmitted
Line unit 24 connects, and the second logarithm period layered transducer elements 2 and the second transmission line unit 24 connect；Second logarithm period layered transducer elements
2 designs for taking traditional log-periodic antenna, its size is identical with the first logarithm period layered transducer elements 4, position and first
Major axis of the logarithm period layered transducer elements 4 on dielectric-slab 1 is in a center of symmetry；Second rectangle coupled resonators array 6,8,10,12,
14th, 16,18,20,22 size and identical, the position of the first rectangle coupled resonators array 5,7,9,11,13,15,17,19,21
It is in a center of symmetry with major axis of the first rectangle coupled resonators array 5,7,9,11,13,15,17,19,21 on dielectric-slab 1.
As shown in figure 4, there are the 3rd transmission line unit 26, the 3rd transmission line list in the center of the dielectric-slab 1 described in the present embodiment
One end of unit 26 and input port 23 connect, and the other end and short-circuit end line 3 connect.
As shown in figure 5, the first rectangle coupled resonators array 5,7,9,11,13,15,17,19,21 described in the present embodiment
With the second rectangle coupled resonators array 6,8,10,12,14,16,18,20,22, the structure of wherein each unit is identical, according to sequence
Number, its size presses a proportionality constantChange into ratio is waited；By taking rectangle coupled resonators array 5 as an example, by square
The first C-channel line unit 28, the second C-channel line unit 29 is etched on shape resonance blade unit 27 to obtain.
Increase by first, second on the logarithm period layered transducer elements 4 of dielectric-slab 1 and first, the second logarithm period layered transducer elements 2
Rectangle coupled resonators array, the size of first, second rectangle coupled resonators array, position and shape are all adjustable, and first,
It is innovative point of the invention that two rectangle coupled resonators arrays are fed by way of coupling.
Described short-circuit end line 3, the first logarithm period layered transducer elements 4, second the 2, first transmission of logarithm period layered transducer elements
Line unit 25, the second transmission line unit 24, the 3rd transmission line unit 26 and the first rectangle coupled resonators array 5,7,9,11,
13rd, the rectangle resonance piece list in the 15,17,19,21, second rectangle coupled resonators array 6,8,10,12,14,16,18,20,22
Unit 27 is conductor.
Described the first C-channel line unit 28 and the second C-channel line unit 29 is all in the first rectangle coupled resonators battle array
Carved on the 5,7,9,11,13,15,17,19,21, second rectangle coupled resonators of row array 6,8,10,12,14,16,18,20,22
The corresponding seam shape of etching off, and the air element structure for being formed.
Described the first transmission line unit 25, the second transmission line unit 24, the 3rd transmission line unit 26 are all 50Uniformly
Transmission line.
Described dielectric-slab 1, its dielectric constant is 4.4, and thickness is 2.4mm.
The outer signal source of input port unit 23 described in the present embodiment, additional pumping signal passes through the 3rd transmission line list
Unit 26, short-circuit end line 3, the first transmission line unit 25, the second transmission line unit 24, the first logarithm period layered transducer elements 4, second pair
One number time layered transducer elements 2, then by the first logarithm period layered transducer elements 4, the second logarithm period layered transducer elements 2 and the first rectangle coupling
Close the 5,7,9,11,13,15,17,19,21, second rectangle coupled resonators of resonator array array 6,8,10,12,14,16,18,
20th, 22 coupling, realizes the feed to antenna.By adjusting the 3rd transmission line unit 26, short-circuit end line 3, the first transmission line list
First 25, second transmission line unit 24, the first logarithm period layered transducer elements 4, the size of the second logarithm period layered transducer elements 2, and
First logarithm period layered transducer elements 4, the second logarithm period layered transducer elements 2 and the first rectangle coupled resonators array 5,7,9,11,
13rd, the size of the 15,17,19,21, second rectangle coupled resonators array 6,8,10,12,14,16,18,20,22 and position and
Both relative positions and shape, realize expanding its low frequency bandwidth, reduce the purpose of cut-off frequency and compression volume.
As shown in Figure 6, it is the return loss of the present embodiment.Wherein abscissa represents frequency variable, and unit is GHz；It is vertical to sit
Mark represents return loss variable, and unit is dB.The passband of new antenna of the present invention is 0.4-1.8GHz, and return loss is in passband
Less than -10dB, with traditional log-periodic antenna identical directional characteristic, antenna size is 300mm × 368mm.
As shown in Figure 7, it is the present embodiment H faces normalization polar coordinates directional diagram.
As shown in Figure 8, it is the present embodiment E faces normalization polar coordinates directional diagram.
Claims (8)
1. a kind of logarithm period element antenna for loading rectangle coupled resonators, an including dielectric-slab for playing a supportive role, one
Individual input port, it is characterised in that
The front of the dielectric-slab has：First transmission line unit, the first logarithm period layered transducer elements, the first rectangle coupled resonators
Array, short-circuit end line, wherein：
One end of first transmission line unit and input port connect, and the other end and short-circuit end line connect, the first logarithm period oscillator
Array and the first transmission line unit connect；First logarithm period layered transducer elements take the design of traditional log-periodic antenna,
Its length, width and spacing reduce in proportion as oscillator sequence number increases；The centre bit of the first rectangle coupled resonators array
In the symmetric position at corresponding first logarithm period layered transducer elements center, with the shortening of logarithm period oscillator length, it is grown and wide
By waiting than shortening, this factor is the arithmetic square root of logarithm period oscillator；
The reverse side of dielectric-slab has：Second transmission line unit, the second logarithm period layered transducer elements, the second rectangle coupled resonators battle array
Row, wherein：
Input port and the second transmission line unit connect, and the second logarithm period layered transducer elements and the second transmission line unit connect；The
Two logarithm period layered transducer elements take the design of traditional log-periodic antenna, its size and the first logarithm period layered transducer elements
Identical, position is in a center of symmetry with the first major axis of the logarithm period layered transducer elements on dielectric-slab；Second rectangle coupled resonators
The size of array is identical with the first rectangle coupled resonators array, and position is with the first rectangle coupled resonators array on dielectric-slab
Major axis it is in a center of symmetry；
There is the 3rd transmission line unit at the center of dielectric-slab, and one end of the 3rd transmission line unit and input port connect, the other end and
Short-circuit end line connects；
Input port is connected with the first transmission line unit, the second transmission line unit, the 3rd transmission line unit respectively, wherein being input into
The signal end of port and the connection of the 3rd transmission line unit, the ground of input port and the first transmission line unit, the second transmission line unit
Connection；The two ends of short-circuit end line are connected with the first transmission line unit and the 3rd transmission line unit respectively；The coupling of first rectangle is humorous
Shake device array and the second logarithm period layered transducer elements are located at the same position of dielectric-slab positive and negative；Second rectangle coupled resonators battle array
Row are located at the same position of dielectric-slab positive and negative with the first logarithm period layered transducer elements.
2. logarithm period element antenna according to claim 1, it is characterised in that：
The first rectangle coupled resonators array and the second rectangle coupled resonators array, the structure of wherein each unit are identical,
According to sequence number, its size presses a proportionality constantChange into ratio is waited；Respectively coupled in rectangle coupled resonators array humorous
Shake device, is obtained by etching the first C-channel line unit, the second C-channel line unit on the rectangle resonance blade unit.
3. logarithm period element antenna according to claim 2, it is characterised in that：
The first described rectangle coupled resonators array and the size of the second rectangle coupled resonators array and relative first transmission
Line unit, the second transmission line unit position it is adjustable；The first described rectangle coupled resonators array and the second rectangle are coupled
In the structure of resonator array, the length and width of the first C-channel line unit and the second C-channel line unit are adjustable, and the first C-shaped
The length of line of rabbet joint unit and the length and width that should be respectively greater than the second C-channel line unit wide, the line of rabbet joint width of the two should be identical, and the line of rabbet joint is wide
Degree is adjustable.
4. the logarithm period element antenna according to claim 1,2 or 3, it is characterised in that：
Described short-circuit end line, the first logarithm period layered transducer elements, the second logarithm period layered transducer elements, the first transmission line unit,
Second transmission line unit, the 3rd transmission line unit and the first rectangle coupled resonators array, the second rectangle coupled resonators array
In rectangle resonance blade unit be conductor.
5. logarithm period element antenna according to claim 3, it is characterised in that：
Described the first C-channel line unit and the second C-channel line unit is all in the first rectangle coupled resonators array, the second square
Etched on shape coupled resonators array and remove corresponding seam shape, and the air element structure for being formed.
6. according to the logarithm period element antenna that one of claim 1-3 is described, it is characterised in that：
Described input port unit outer signal source, additional pumping signal passes through the 3rd transmission line unit, short-circuit end line, the
One transmission line unit, the second transmission line unit, the first logarithm period layered transducer elements, the second logarithm period layered transducer elements, then pass through
First logarithm period layered transducer elements, the second logarithm period layered transducer elements and the first rectangle coupled resonators array, the second rectangle coupling
The coupling of resonator array is closed, the feed to antenna is realized；By adjusting the 3rd transmission line unit, short-circuit end line, the first transmission
Line unit, the second transmission line unit, the first logarithm period layered transducer elements, the size of the second logarithm period layered transducer elements, Yi Ji
One logarithm period layered transducer elements, the second logarithm period layered transducer elements are coupled with the first rectangle coupled resonators array, the second rectangle
The size of resonator array and position and both relative position and shape, realize expanding its low frequency bandwidth, reduce cutoff frequency
The purpose of rate and compression volume.
7. according to the logarithm period element antenna that one of claim 1-3 is described, it is characterised in that：The first described transmission line list
Unit, the second transmission line unit, the 3rd transmission line unit are all 50 Ω uniform transmission lines.
8. according to the logarithm period element antenna that one of claim 1-3 is described, it is characterised in that described dielectric-slab, its Jie
Electric constant is 4.4, and thickness is 2.4mm.
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| CN105206927B (en) * | 2015-09-06 | 2018-03-30 | 哈尔滨工业大学 | Printed form monopole folded dipole log-periodic antenna |
| CN105655697B (en) * | 2016-01-05 | 2018-12-18 | 上海交通大学 | Wideband micro-strip Log Periodic Array Antenna |
| CN111755807B (en) * | 2020-05-20 | 2022-06-03 | 南京邮电大学 | Equiangular spiral-based frequency scanning log-periodic antenna |
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|---|---|---|---|---|
| CN2874806Y (en) * | 2006-01-10 | 2007-02-28 | 深圳国人通信有限公司 | Log-periodical antenna |
| CN103151602A (en) * | 2011-06-30 | 2013-06-12 | 盖普威夫斯公司 | Improved broadband multi-dipole antenna with frequency-independent radiation characteristics |
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| Publication number | Publication date |
|---|---|
| CN104538733A (en) | 2015-04-22 |
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Effective date of registration: 20190624 Address after: Room 102, New Generation Communication Technology Industrial Park, Room 5, 1689 Zizhu Road, Yushan Town, Kunshan City, Suzhou City, Jiangsu Province Patentee after: Kunshan billion interest Information Technology Research Institute Co., Ltd. Address before: 200433 No. 220, Handan Road, Shanghai, Yangpu District Patentee before: Fudan University |