CN205811042U - A kind of S-band Optically controlled microwave element antenna - Google Patents
A kind of S-band Optically controlled microwave element antenna Download PDFInfo
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- CN205811042U CN205811042U CN201620709939.XU CN201620709939U CN205811042U CN 205811042 U CN205811042 U CN 205811042U CN 201620709939 U CN201620709939 U CN 201620709939U CN 205811042 U CN205811042 U CN 205811042U
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- oscillator
- medium substrate
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- director
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Abstract
The utility model discloses a kind of S-band Optically controlled microwave element antenna, relate to wireless communication technology field, including medium substrate, three directors, a pair excitation oscillator, a reflection oscillator and microstrip feed line；Wherein, medium substrate includes that front and back, director, excitation oscillator and reflection oscillator are positioned at the front of medium substrate, and microstrip feed line is positioned at the back side of medium substrate；The front of described medium substrate is arranged covers the director of copper, excitation oscillator and reflection oscillator, and wherein three directors, excitation oscillators are set in turn in medium substrate from top to bottom with reflection oscillator.Compared with prior art, this utility model has the advantages that and carries out emulating by Ansoft HFSS electromagnetic simulation software and contrast with the actual test of antenna, result shows: the relative bandwidth of standing-wave ratio (VSWR) 2 reaches 40%, is 6dB in center frequency point 2.4GHz maximum gain.
Description
Technical field
This utility model relates to wireless communication technology field, is specifically related to a kind of S-band Optically controlled microwave element antenna.
Background technology
In recent years, all kinds of demands make phased-array technique development, and optically controlled phased array antennas has become scholars and closed
The focus of note.Such as, in modern war, in order to improve phased-array radar resolution, identification ability and solution target to target
Radar imagery problem, it is desirable to radar has big instantaneous signal bandwidth.Meanwhile, for reduce the probability that is trapped of radar signal and
Reduce the threat of antiradiation missile, generally use the spread spectrum signal with big instant bandwidth.But, phased array based on the phase shifter
Radar antenna is when carrying out large-angle scanning, due to transition time and aperture effect so that the instant bandwidth of signal is limited.
In order to realize the wideband wide scan of phased array, it is necessary to use true-time delay TTD (True Time Delay) to take
For the phase shifter in conventional phased array, but because quantity brings difficulty to Project Realization too much, compromise method is at phased array
Introduce TTD on Subarray and carry out compensation of delay.Traditional TTD is made up of waveguide or coaxial cable, big to a bore 20m
Type phased array antenna, when scan angle is 60 °, the length of TTD is about 17m, the longest waveguide or coaxial cable, the most right
The loss of broadband signal or Project Realization, all will make troubles.If microwave signal be modulated on optical fiber, use optical fiber
As TTD, referred to as OTTD (Optical True Time Delay), owing to optical carrier frequency is high, signal bandwidth carries relative to light
Wave frequency is minimum, and circuit has stable transmission characteristic.System weight will be made to alleviate, and volume reduces simultaneously, dry without mutually radiation
Disturb.
In phased array antenna, aerial array is to be lined up array according to certain rules by multiple radiating elements, radiating element
Radiation characteristic directly affects the radiation characteristic of antenna array, in order to make array factor can determine battle array performance, it is necessary to make radiating element exist
In the range of scan angle, its gain is constant, and does not radiate outside scan angle scope, and such radiating element is exactly preferable.Now
The radiation characteristic of aerial array is determined by array factor in sweep limits completely, and does not radiate outside scan angle scope.
And actual gain is weighted by unit directivity, radiating element directivity has a strong impact on the essence of the beam position of array antenna
Degree.At the design aspect of phased array element antenna, Quasi-Yagi antenna is little due to its cross polarization, gain stabilization, and front and back ratio is high, easily
Studied widely in features such as forming arrays, but its antenna gain and relative bandwidth are need to strengthen.
Yagi aerial is made up of a main element, a reflector and several directors.Micro-strip Quasi-Yagi antenna is main
It is made up of two parts: top half is radiant section, including printed dipole and director；The latter half achieves microstrip line and arrives
The conversion of coplanar striplines (CPS).Two arms difference half-wavelengths of microstrip line, post mould excitation with realize coplanar striplines, thus rise
To the effect of a wideband balun, the ground plane that the microstrip line back side is blocked plays the effect of reflector.
Utility model content
The purpose of this utility model is to overcome the shortcoming of prior art, proposes a kind of S-band Optically controlled microwave unit sky
Line, this antenna solves the tradition gain of Quasi-Yagi antenna and relative bandwidth has problem to be reinforced.
This utility model is achieved through the following technical solutions: a kind of S-band Optically controlled microwave element antenna, including medium base
Plate, three directors, a pair excitation oscillator, a reflection oscillator and microstrip feed line；Wherein, medium substrate includes front and the back of the body
Face, director, excitation oscillator and reflection oscillator be positioned at the front of medium substrate, and microstrip feed line is positioned at the back side of medium substrate；Institute
The front of the medium substrate stated is arranged covers the director of copper, excitation oscillator and reflection oscillator, wherein three directors, excitation oscillators
Medium substrate it is set in turn in from top to bottom with reflection oscillator.
As preferably, described medium substrate uses FR4 epoxy resin base plate, and its relative dielectric constant is 4.4, loss angle
Just being cut to 0.025, thickness is 1.6mm.
As preferably, three described directors are positioned at the director slotting in middle on top.
As preferably, the back side microstrip feed line of described medium substrate uses G shaped microstrip feed structure.
As preferably, antenna uses print structure, reflection oscillator to can not only be used for the reflector of antenna, can present as micro-strip again
The floor of line.
As preferably, three described directors are positioned at the middle and upper part of medium substrate, and excitation oscillator is connected with reflection oscillator
And it being positioned at the middle and lower part of medium substrate, a pair described excitation oscillator is symmetrical set in medium substrate, and described excitation is shaken
Son and microstrip feed line are separately positioned on the sustained height position of medium substrate front and back.
Compared with prior art, this utility model has the advantages that this utility model is inheriting typical quasi-Yagi spark gap
On the basis of antenna advantage, by changing the band of the length and width raising S-band Optically controlled microwave element antenna of balun, oscillator
Width, uses at the antenna back side " G " shaped microstrip feeding classification to change the beam angle of S-band Optically controlled microwave element antenna, increases
Add director and increase the gain of S-band Optically controlled microwave element antenna further at top director slotting in middle and radiate strong
Degree, and have employed microband printing technology and carried out the low Section Design of plane, reflection oscillator, excitation oscillator and director development are for attached
And cover copper part at medium substrate, owing to have employed print structure, feed as feed microstrip line, utilize couple feed skill simultaneously
Art, reflection oscillator part can not only be used for the reflector of S-band Optically controlled microwave element antenna, again can be as the ground of microstrip feed line
Plate, two arms of excitation oscillator are all connected with floor, so can be easy to meet the balance that two-arm feeds, and have only to adjust micro-simultaneously
The width of band wire and the length of coupling unit can realize good impedance matching.By Ansoft HFSS electromagnetic simulation software
Carrying out emulating and contrast with the actual test of antenna, result shows: the relative bandwidth of standing-wave ratio (VSWR) 2 reaches 40%,
Center frequency point 2.4GHz maximum gain is 6dB.This kind of improved procedure reasonable in design, can be effectively improved antenna bandwidth and
Gain.
Accompanying drawing explanation
Fig. 1 is this utility model antenna face figure (being inverted to the right)；
Fig. 2 is this utility model antenna back view (being inverted to the right)；
Fig. 3 is this utility model antenna overall structure schematic diagram (be inverted to the right), wherein, medium substrate 1, director 2, swashs
Vibrator 3, reflection oscillator 4, microstrip feed line 5；
Fig. 4 is that this utility model antenna input reflection coefficient surveys simulation comparison figure；
Fig. 5 is that simulation comparison figure surveyed by this utility model antenna gain；
Fig. 6 is that this utility model aerial voltage standing-wave ratio surveys simulation comparison figure.
Detailed description of the invention
Below in conjunction with accompanying drawing, this utility model content is described further.
Embodiment, as shown in Figure 1,2 and 3, a kind of S-band Optically controlled microwave element antenna includes: medium substrate 1, three
Director 2, a pair excitation oscillator 3, reflection oscillator 4, microstrip feed line 5；Described medium substrate 1 uses FR4 material, and it is relative
Dielectric constant is 4.4, and loss angle tangent is 0.025, and thickness is 1.6mm；The front of medium substrate 1 arrange cover copper director 2,
Excitation oscillator 3 and reflection oscillator 4, wherein three directors 2, excitation oscillators 3 are set in turn in Jie from top to bottom with reflection oscillator 4
Matter substrate, three directors 2 are positioned at the middle and upper part of medium substrate 1, and excitation oscillator 3 is connected with reflection oscillator 4 and is positioned at medium base
The middle and lower part of plate 1；The back side of medium substrate 1 then arranges microstrip feed line 5, and a pair excitation oscillator 3 is symmetrical set in medium base
Plate 1.
Three directors 2 are positioned at director 2 slotting in middle on top, by changing its gap of length of director 2
Width can optimize impedance bandwidth and the gain of antenna.
Excitation oscillator 3 is connected with reflection oscillator 4, by changing length and excitation oscillator 3 and the reflection oscillator of excitation oscillator 3
Distance between 4 can optimize difference loss, gain and the resonant frequency of antenna.
This utility model uses microstrip lines feed structure, the increase of director 2 number and opening of top director 2
Seam technology effectively raises bandwidth and the gain of antenna.
Principle illustrates, being calculated as follows of this utility model S-band Optically controlled microwave element antenna size:
Parameter calculation formula according to micro-strip Quasi-Yagi antenna: the length of excitation oscillator unit should be 0.5 λg, director
Length should be 0.45 λg, reflector should be 0.25 λ with the distance of excitation oscillatorg, encourage the spacing of oscillator and director and respectively guide into
Distance between device is the most equal, generally 0.2 λg, wherein λgIts computing formula of effective wavelength for antenna is:
In formula: c represents the speed that electromagnetic wave is propagated in free space；εrRepresent the relative dielectric constant of medium substrate；f
Represent frequency.
The computing formula of oscillator width:
In formula: frIt it is the resonant frequency of antenna.
This utility model S-band Optically controlled microwave element antenna has reached following running parameter: bandwidth of operation is at 2.34-
2.49GHz antenna reflection coefficient <-10dB；Antenna gain 6dBi at center frequency point 2.4GHz；Polarization mode is linear polarization.
As it is shown in figure 1, the microstrip line in its front of this utility model is determined by parameter a, h1, b1, b2, these 4 parameter values
It is respectively 0.7mm, 40.9mm, 3.4mm, 3.2mm；The antenna back side comprise excitation oscillator, director, reflection oscillator by L, W, H,
These 10 parameter values of L1, L2, w1, w2, d1, d2, g be respectively 125mm, 90mm, 20mm, 26m, 28mm, 20mm, 5mm, 13mm,
20mm、1mm。
Claims (6)
1. a S-band Optically controlled microwave element antenna, it is characterised in that include medium substrate, three directors, a pair excitation
Oscillator, a reflection oscillator and microstrip feed line；Wherein, medium substrate includes front and back, director, excitation oscillator and reflection
Oscillator is positioned at the front of medium substrate, and microstrip feed line is positioned at the back side of medium substrate；The front of described medium substrate is arranged to be covered
The director of copper, excitation oscillator and reflection oscillator, wherein three directors, excitation oscillators set the most successively with reflection oscillator
It is placed in medium substrate.
A kind of S-band Optically controlled microwave element antenna the most according to claim 1, it is characterised in that described medium base
Plate uses FR4 epoxy resin base plate, and its relative dielectric constant is 4.4, and loss angle tangent is 0.025, and thickness is 1.6mm.
A kind of S-band Optically controlled microwave element antenna the most according to claim 1 and 2, it is characterised in that described three
Director is positioned at the director slotting in middle on top.
A kind of S-band Optically controlled microwave element antenna the most according to claim 1, it is characterised in that described medium base
The back side microstrip feed line of plate uses G shaped microstrip feed structure.
5. according to a kind of S-band Optically controlled microwave element antenna described in claim 1 or 4, it is characterised in that antenna uses print
Brush configuration, reflection oscillator can not only be used for the reflector of antenna, again can be as the floor of microstrip feed line.
A kind of S-band Optically controlled microwave element antenna the most according to claim 1, it is characterised in that described three are drawn
Be positioned at the middle and upper part of medium substrate to device, excitation oscillator is connected with reflection oscillator and is positioned at the middle and lower part of medium substrate, described
A pair excitation oscillator is symmetrical set in medium substrate, and described excitation oscillator and microstrip feed line are separately positioned on medium substrate
The sustained height position of front and back.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620709939.XU CN205811042U (en) | 2016-07-06 | 2016-07-06 | A kind of S-band Optically controlled microwave element antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620709939.XU CN205811042U (en) | 2016-07-06 | 2016-07-06 | A kind of S-band Optically controlled microwave element antenna |
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| Publication Number | Publication Date |
|---|---|
| CN205811042U true CN205811042U (en) | 2016-12-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620709939.XU Expired - Fee Related CN205811042U (en) | 2016-07-06 | 2016-07-06 | A kind of S-band Optically controlled microwave element antenna |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106025530A (en) * | 2016-07-06 | 2016-10-12 | 五邑大学 | S-waveband light-controlled phased array unit antenna |
-
2016
- 2016-07-06 CN CN201620709939.XU patent/CN205811042U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106025530A (en) * | 2016-07-06 | 2016-10-12 | 五邑大学 | S-waveband light-controlled phased array unit antenna |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161214 Termination date: 20190706 |