CN2426641Y

CN2426641Y - Microband folding double-frequency double-polarizing broad-band antenna

Info

Publication number: CN2426641Y
Application number: CN00242902U
Authority: CN
Inventors: 王贞松; 马小玲
Original assignee: Institute of Electronics of CAS
Current assignee: Institute of Electronics of CAS
Priority date: 2000-07-06
Filing date: 2000-07-06
Publication date: 2001-04-11
Anticipated expiration: 2010-07-06

Abstract

A microstrip, foldable, dual-frequency, dual-polarized broadband antenna, comprising: a frame with a hexahedral structure, another quadrangle fixedly connected to a position parallel to the lower quadrilateral of the frame; On the upper quadrilateral of the frame; a second medium layer is a thin film stretched over the lower quadrilateral of the frame; a third dielectric layer is a thin film stretched over the other quadrilateral under the frame; a radiation patch Pasted on the first dielectric layer; a ground plate is pasted between the second and third dielectric layers; a patch is pasted on the second dielectric layer; a feeder is pasted below the third dielectric layer.

Description

Little band, collapsible, dual-band and dual-polarization broad-band antenna

The utility model belongs to a kind of antenna, is meant a kind of little band, collapsible, dual-band and dual-polarization broad-band antenna especially.

Propose the notion of associated microstrip radiating element from nineteen fifty-three professor Deschamps, be developed into first practical microstrip antenna so far to researchers such as Howell in 1972 and Munson; Based on many advantages of microstrip antenna, for example planar structure, can with integrated circuit compatibility etc., obtained extensive use.The antenna worker of various countries is for overcoming its shortcoming, improving its performance and carrying out unremitting effort.Multifrequency multipolarization technology makes microstrip antenna can obtain more information; Stepped construction is improved the microstrip antenna bandwidth.

But the bandwidth raying paster of microstrip antenna and the influence of the dielectric layer between ground plate: the dielectric constant of medium is big more, and the beamwidth of antenna is more little.And dielectric loss reduces the gain and the efficient of antenna.

Because therefore the requirement of performance index such as antenna gain and beamwidth often selects the antenna element of array to form bigger antenna array.Like this, when some application scenario (for example using in space environment), the volume of antenna array and quality are still a restriction.And big antenna array neither the part nothing the matter in transportation or stretching, extension.

The purpose of this utility model is, a kind of little band, collapsible, dual-band and dual-polarization broad-band antenna are provided, and it has convenient folding structure, is beneficial to and stretches and transportation.

Another purpose of the present utility model is, a kind of little band, collapsible, dual-band and dual-polarization broad-band antenna are provided, and it has a kind of structure of intimate air dielectric, to improve bandwidth and gain, weight reduction.

A kind of little band of the utility model, collapsible, dual-band and dual-polarization broad-band antenna is characterized in that, comprising:

One framework is hexahedron structure, is connected with another quadrangle on the position parallel with quadrangle under this framework;

One first dielectric layer, this first dielectric layer is a film, this first dielectric layer stretches tight and covers on quadrangle on the framework;

One second dielectric layer, this second dielectric layer is a film, this second dielectric layer stretches tight and covers on the following quadrangle of framework;

One the 3rd dielectric layer, the 3rd dielectric layer is a film, the 3rd dielectric layer stretches tight and covers on another quadrangle below the framework;

One radiation patch is attached on first dielectric layer;

One ground plate is attached between second, third dielectric layer;

On second dielectric layer, post paster;

Below the 3rd dielectric layer, post feeder line.

Wherein there is feeder line the both sides of the paster that posts on second dielectric layer.

The hinge that a plurality of antennas can be linked together wherein is installed on four limits of framework.

Wherein, will splice around a plurality of the 3rd dielectric layers splicing around a plurality of first dielectric layers, and with affixed around the spliced dielectric layer, middle inflation.

Wherein the side at dielectric layer has a valve.

For further specifying structure of the present utility model and feature, below in conjunction with accompanying drawing the utility model is done a detailed description, wherein:

Fig. 1 is a radiation patch of the present utility model and than the feeder line of low-frequency range;

Fig. 2 is a support frame of the present utility model;

Fig. 3 is ground plate and the higher frequency band feeder line of cracking of the present utility model;

Fig. 4 is a structural representation of the present utility model;

Fig. 5 is the antenna linear array of forming with a plurality of the utility model;

Fig. 6 is the antenna surface battle array of forming with a plurality of the utility model;

Fig. 7 is the antenna surface battle array of forming with a plurality of the utility model, shows the embodiment of inflatable structure simultaneously.

Formation of the present utility model is stepped construction as shown in Figure 4, and two-

layer radiation patch

40,10 is arranged.On support frame 20 (see figure 2)s, stretch tight and be stamped three strata ester films or other

thin film dielectrics

41,42,43, from top to bottom: post first radiation patch 40 above the first film medium 41, the second and the 3rd dielectric layer 42,43 sandwich structure consistings, the centre is ground plate 30 (see figure 3)s that have coupling slot, be to post second radiation patch 10 above the second layer medium 42, this radiation patch 10 is connected with feeder line 11 (see figure 1)s than low-frequency range, is feeder line 31 (see figure 3)s of higher frequency band below the 3rd layer of medium 43.Between the ground floor medium 41 and second radiation patch 10 is air dielectric.

The utility model is selected rectangular patch for use, in order to increase bandwidth, uses double-deck radiation patch.Upper strata paster 40 since below it effective dielectric constant of medium little, its size is bigger.Patch length is to a frequency resonance, and width is to another frequency resonance, and from two adjacent edged feeders, finishes the dual-band and dual-polarization work (for example to the L-band horizontal polarization, the S-band perpendicular polarization) of antenna.It between the paster air dielectric.For guaranteeing the planarization of radiation patch, constitute framework 20 of the present utility model with insulating material (as carbon fiber pipe), these framework 20 (see figure 2)s are hexahedron structure, are connected with another quadrangle 21 on the position parallel with 20 times quadrangles of this framework; At three strata ester films or other the thin-

layered medium

41,42,43 of tacking down, ground plate 30,

radiation patch

40,10 and feeder line 11,31 just are attached on polyester film or other the thin film dielectrics.

Feed system (being prior art) is selected the transmission line feed for use than low band, and higher band is selected aperture-coupled feed for use.For reducing cross polarization radiation, the anti-phase symmetry of feed (180 ° of the feed phase phasic differences on paster both sides).For reducing radiation than the low band feeder line, with paster be bonded at dielectric constant greatly and on the very little thin film dielectrics of thickness than the feeder line of low band with lossless glue, the another side of thin film dielectrics is stained with the ground plate that has coupling slot, be stained with the feed system of thin film dielectrics and higher frequency band again at the another side of ground plate, the feed system of higher frequency band by the slit of being opened on the ground plate to the radiation patch feed.But each self-optimizing of the feed system of two frequency ranges.Ground plate can reduce the influence of parasitic radiation to directional diagram and polarization purity between feed system and radiation element.Thicker air dielectric and top radiation patch can improve the bandwidth of system, and its feed is the emittance of paster below electromagnetic field couples.

The antenna directivity of single card sheet is low, and beamwidth big (70 °-90 °) for obtaining suitable directivity and beamwidth, just need combine antenna element by certain mode, line up antenna array.The simplest row's battle array mode is a line array.See Fig. 5, present embodiment is made up of 5 identical the utility model.For realizing folding structure, the both sides 201,202 of the support frame 20 of each unit are equipped with hinge 51 (hinge is a prior art), and interconnect.

Fig. 6 has provided the face battle array of being made up of a plurality of the utility model, and embodiment of the present utility model is 5 * 6.Framework is connected by hinge.

See also Fig. 7, change the support bar in the support frame 20 into the polyester film of sealing or other airtight thin film dielectrics, connect the hinge mightiness belt.Inflation in polyester film during antenna work is to support the planar structure at paster and feeder line place.For the deformation of polyester film, in feeding network, carry out phase compensation.

Splicing around just will a plurality of first dielectric layers 41, will a plurality of the 3rd dielectric layers 43 around splicing, and with affixed around the spliced dielectric layer 41,43, middle inflation has a valve 61 in a side of dielectric layer.

Effect of the present utility model is: the most significant advantage of this antenna is collapsible, and medium Mainly be air, so it transports conveniently, loss is little, and quality is light, and relative bandwidth is bigger, cost Low. More owing to be dual-band and dual-polarization, serve many purposes.

Claims

1. A microstrip, foldable, dual-frequency dual-polarized broadband antenna, characterized in that it includes:

A frame is a hexahedron structure, and another quadrangle is affixed to the position parallel to the lower quadrangle of the frame;

A first medium layer, the first medium layer is a thin film, and the first medium layer stretches over the upper quadrilateral of the frame;

A second medium layer, the second medium layer is a thin film, and the second medium layer stretches over the lower quadrilateral of the frame;

A third dielectric layer, the third dielectric layer is a thin film, and the third dielectric layer covers the other quadrilateral under the frame;

A radiation patch is pasted on the first dielectric layer;

A grounding plate is pasted between the second and third dielectric layers;

A patch is pasted on the second dielectric layer;

A feeder is pasted under the third dielectric layer.

2. The microstrip, foldable, dual-frequency, dual-polarized broadband antenna according to claim 1, wherein there are feeders on both sides of the patch pasted on the second dielectric layer.

3. The microstrip, foldable, dual-frequency, dual-polarized broadband antenna according to claim 1, wherein hinges for connecting multiple antennas are installed on the four sides of the frame.

4. The microstrip, foldable, dual-frequency, dual-polarized broadband antenna according to claim 1, wherein the surroundings of multiple first dielectric layers are spliced, and the surroundings of multiple third dielectric layers are spliced, And the surroundings of the spliced medium layer are fixed, and the middle is inflated.

5. The microstrip, foldable, dual-frequency, dual-polarized broadband antenna according to claim 4, wherein an air nozzle is opened on one side of the dielectric layer.