CN2473766Y

CN2473766Y - Omnidirectional antenna

Info

Publication number: CN2473766Y
Application number: CN 01214866
Authority: CN
Inventors: 吴中林; 傅光; 马澄波
Original assignee: Tongyu Comm Equipment Co ltd Z
Current assignee: Tongyu Comm Equipment Co ltd Z
Priority date: 2001-01-07
Filing date: 2001-01-07
Publication date: 2002-01-23
Anticipated expiration: 2011-01-07

Abstract

The utility model discloses an omni-directional antenna, comprising a main feeder, the main feeder is a flat dual line, the middle of the two flat lines is a medium plate. The utility model is characterized in that the main feeder is provided with at least one antenna array radiation unit, the radiation unit is a double-sided symmetrical printing half-wave dipole, every half-wave dipole is composed of an upper arm and a lower arm, and each arm is composed of four metal plates, the utility model can not only broaden the working frequency band, but also significantly improve the roundness of a horizontal plane pattern.

Description

Omnidirectional antenna

The utility model relates to a kind of antenna, especially a kind of omnidirectional antenna.

A kind of as omnidirectional antenna, microstrip printed have in light weight, advantages such as distributing point is few, processing high conformity.Existing use microstrip printed, it is to be formed by two-sided copper clad plate corrosion, and the one side of dielectric-slab is a line, and another side connects radiating doublet with the band line.Because this microstrip printed two sides band line is different wide, has only a radiating doublet, another side does not have radiating doublet, so antenna omnidirectional is poor.And the omni-directional of expression omnidirectional antenna is represented with deviation in roundness, and deviation in roundness is again to weigh the important indicator of omnidirectional antenna performance quality.By existing national standard, the deviation in roundness of omnidirectional antenna≤± 1.0dB, and above-mentioned microstrip printed deviation in roundness 〉=± 1.5dB, obviously do not reach national standard, therefore be necessary existing microstrip printed performance is done further to improve.

For addressing the above problem, the omnidirectional antenna that provides a kind of omni-directional good is provided the purpose of this utility model.

For achieving the above object, the utility model adopts following scheme:

A kind of omnidirectional antenna, include main feeder, described main feeder is flat two-wire, the centre of two lenticular wires is a dielectric-slab, it is characterized in that being distributed with on the main feeder at least one antenna array radiating element, radiating element is two-sided symmetry printing half-wave dipole, each half-wave dipole is made up of two arms up and down, every arm is made up of four sheet metals, two both sides that are symmetrically distributed in dielectric-slab front main feeder wherein, other two both sides that are symmetrically distributed in dielectric-slab reverse side main feeder, the two metal sheets of dielectric-slab tow sides correspondence electrically connects; The main feeder lenticular wire in the sheet metal of above-mentioned composition upper arm and dielectric-slab front electrically connects, and forms the sheet metal of underarm and the main feeder lenticular wire of dielectric-slab reverse side and electrically connects.

As the further improvement of such scheme, two lenticular wires that it is characterized in that constituting main feeder are wide, and every lenticular wire is constant along its transmission direction width.

Further improvement as such scheme, it is characterized in that when the oscillator number is a lot, be provided with distributing point in the main feeder centre position, the antenna bottom is provided with the feed head, connect a feeder cable between feed head and distributing point, described cable outer conductor is connected at the main feeder of distributing point with the dielectric-slab one side, and heart yearn then passes medium and is connected with the main feeder of another side, the array of feedback at the bottom of two groups about forming, entire antenna is middle feedback array.

The utility model is owing to used two-sided symmetry printing half-wave dipole, and it gets final product the broadening working band, can obviously improve the circularity of horizontal radiation pattern again.Deviation in roundness of the present utility model after measured≤± 0.8dB, obviously reach national regulation ± standard of 1.0dB; Because main feeder is the wide flat two-wire in two sides, and every lenticular wire is constant and uninterrupted along its transmission direction width, can reduce fringe radiation, helps the consistency of horizontal plane directional diagram; When the oscillator number is a lot, adopt centre feed, the array of feedback at the bottom of two groups about the formation, since symmetrical up and down, greatest irradiation direction vertical antenna axis.

The utility model is described in further detail below in conjunction with accompanying drawing embodiment:

Fig. 1: the front view of the utility model embodiment one;

Fig. 2: the rearview of the utility model embodiment one;

Fig. 3: the front view of radiating element;

Fig. 4: the rearview of radiating element;

The A-A cutaway view of Fig. 5: Fig. 4;

The B-B cutaway view of Fig. 6: Fig. 4;

Fig. 7: the front view of the utility model embodiment two;

Fig. 8: the rearview of the utility model embodiment two

Fig. 9: the enlarged drawing of Fig. 7 part " A ";

Figure 10: the enlarged drawing of Fig. 8 part " B ".

Embodiment one: as Fig. 1, this omnidirectional antenna is by main feeder 1 and be distributed with four antenna array radiating elements 2 form on main feeder.As Fig. 2,5,6, main feeder is that the centre of flat two-

wire

4,5, two

lenticular wires

4,5 is a dielectric-slab 3; As Fig. 3,4, radiating element 2 is two-sided symmetry printing half-wave dipole, each half-wave dipole is made up of two arms 6,7 up and down, every arm is made up of four on all four sheet metals 8 of shape, two both sides that are symmetrically distributed in dielectric-slab front main feeder 1 wherein, other two both sides that are symmetrically distributed in dielectric-slab reverse side main feeder 1, the two metal sheets via hole of dielectric-slab tow sides correspondence connects, and does not have solder joint; The sheet metal of above-mentioned composition upper arm 5 and dielectric-slab front main feeder lenticular wire 4 electrically connect, and form the sheet metal of underarm and the main feeder lenticular wire 5 of dielectric-slab reverse side and electrically connect.

Be to reduce fringe radiation, the consistency of favourable and horizontal plane directional diagram; Constitute two lenticular wires the 4, the 5th of main feeder, wide, and every lenticular wire is constant along its transmission direction width.

The total feed end of above-mentioned antenna is in the bottom (not shown), is called the end to present two-sided symmetrical printed dipole antenna battle array.Along with the variation of frequency, size has corresponding variation, but basic structure is constant, in 0.8Hz to 3.6Hz frequency range, and deviation in roundness＜± 0.8dB, the bandwidth of standing-wave ratio＜1.5＞8%.

Embodiment two: as Fig. 7,8,9,10, and when oscillator is a lot, oscillator phase difference increase up and down in working frequency range during end feedback, cause vertical plane (E face) directional diagram asymmetric, the greatest irradiation deviation in driction is and upwarps or have a down dip, and adopts centre feed effectively to address this problem.As Fig. 7,8, antenna is provided with ten half-wave dipoles, establishing distributing point 11 on the main feeder between the 5th and the 6th oscillator, the antenna bottom is provided with feed head 12, between feed head and distributing point, connect a feeder cable 13 of being close to main feeder lenticular wire 5, cable outer conductor connects at the main feeder lenticular wire 5 of distributing point with dielectric-slab 3 reverse side, and heart yearn then passes medium and connects with the main feeder lenticular wire 4 in front, five element array of feedback at the bottom of two groups about forming.Because the amplitude of distributing point oscillator of correspondence position about in the of 11 is identical with phase place, directional diagram is symmetrical up and down in the vertical plane, so greatest irradiation direction vertical antenna axis does not depart from.

Claims

1, a kind of omnidirectional antenna, include main feeder, described main feeder is flat two-wire, the centre of two lenticular wires is a dielectric-slab, it is characterized in that being distributed with on the main feeder at least one antenna array radiating element, this radiating element is two-sided symmetry printing half-wave dipole, each half-wave dipole is made up of two arms up and down, every arm is made up of four sheet metals again, two both sides that are symmetrically distributed in dielectric-slab front main feeder wherein, other two both sides that are symmetrically distributed in dielectric-slab reverse side main feeder, the two metal sheets of dielectric-slab tow sides correspondence electrically connects; The main feeder lenticular wire in the sheet metal of above-mentioned composition upper arm and dielectric-slab front electrically connects, and forms the sheet metal of underarm and the main feeder lenticular wire of dielectric-slab reverse side and electrically connects.

2, omnidirectional antenna according to claim 1 is characterized in that constituting two-sided each arm of symmetry printing half-wave dipole and is made up of four sheet metals that are symmetrically distributed in main feeder both sides and dielectric-slab both sides, and these four sheet metal shapes are in full accord.

3, omnidirectional antenna according to claim 1, two lenticular wires that it is characterized in that constituting main feeder are wide, and every lenticular wire is constant along its transmission direction width.

4, according to claim 1 or 2 or 3 described omnidirectional antennas, it is characterized in that when the oscillator number is a lot, be provided with distributing point in the main feeder centre position, the antenna bottom is provided with the feed head, connect a feeder cable between feed head and distributing point, described cable outer conductor is connected at main feeder of distributing point and dielectric-slab, and heart yearn then passes medium and is connected with the another side main feeder, the array of feedback at the bottom of two groups about forming, entire antenna is middle feedback array.

5: omnidirectional antenna according to claim 4 is characterized in that described feeder cable is close on the main feeder lenticular wire of dielectric-slab one side.