CN201149894Y - Broad band omnidirectional antenna - Google Patents

Abstract

The utility model discloses a broadband omnidirectional antenna whose main feed line 12 perforates a positioning plate 13 and is connected with a 1/2 power divider 9. The output port of the 1/2 power divider 9 is divided into two paths which respectively feed a radiating element 3 and a radiating element 3` through a feed cable 7 and 8; the length of the feed cable 7 and 8 is the same; and the feed cable 7 and 8 equally feed the two radiating elements. The feed cable 7 and 8 enter into the radiating elements through the hole on the center guide camp 11; then the feed cable 7 perforates the fringe of he lower arm of the radiating element 3 and enters into the sleeve oscillator to the lower fringe of the upper arm; an inner and an outer conductor are respectively welded at the fringe of the upper arm and at the inner fringe of the lower arm. In the same way, the feed cable 8 perforates the guide camp 11 and passes through the hole thereon and enters into radiating element 3` to the lower fringe of the upper arm along the inner fringe of the lower arm; the inner and the outer conductor are respectively welded at the lower fringe of the upper arm and at the inner fringe of the lower arm.

Description

A kind of broadband omni-directional antenna

Technical field

The utility model relates to and is applied to communication, in the moving communicating field in all communications network systems as the usefulness that transmits and receives radio signal, frequency coverage is 806-960,1710-2170,2400-2500MHz.Affiliated technical field: Wireless Telecom Equipment, Electromagnetic Field and Microwave Technology, mobile communication antenna.

Background technology

Because radio communication equipment and electronic equipment are towards multi-functional, miniaturization, ultra broadband and the friendly direction of coordinating with surrounding environment develop, this makes broadband, the research of miniature antenna becomes the hot subject of domestic and international mobile communications industry, it relates to the loading and the reactance compensation technique of antenna, the optimal design of miniature antenna external form, be suitable for the design of the miniature antenna broadband matching network that the different districts signal covers and the integrated design of multiband common antenna, a plurality of frequency ranges are integrated into a kind of trend that a kind of antenna structure is current technical development, also are the motive forces that realizes device miniaturization.Antenna product in the past is to design at different working frequency range, stock size and volume are all bigger, variant communications network system independent design, can be compatible or compatible degree depend on the bandwidth and the corresponding performance of antenna system, adopt frequency and road device during some communication products system integration, be not easy to install, improved cost, and the exploitation all be the directional antenna product, though broadband omni-directional antenna product few in number, complex structure are also arranged, processing cost is higher, and there are some defectives in performance, should not promote, and covers to mobile communication cells like this and caused certain degree of difficulty, therefore develop multiband, miniaturization, simple in structure, broadband omni-directional antenna with low cost is very necessary.

The utility model content

In order to summarize the purpose of this utility model, some aspect of the present utility model, advantage and novel feature have been described here.Should be appreciated that, need not all these aspects, advantage and feature and be included among arbitrary special embodiment.

For solving problem and shortage part and the demand that prior art exists, the utility model discloses a kind of broadband omni-directional antenna, its technical scheme is: the input port that main feeder 12 passes location-plate 13 and one-to-two power splitter 9 links together, the output port of power splitter 9 is divided into two-way, give last main element radiating element 3 and following main element radiating element 3 ' feed through feeder cable 7 and 8 respectively, feeder cable 7 and 8 equal in length, secondary homophase feed such as reach for up and down two radiating elements, the hole that they are led in the battalion 11 by the center enters wherein, the feeder cable 7 underarm edge that passes main element radiating element 3 enters in the sleeve oscillator then, to the upper arm its lower edge, its internal and external conductor is welded on the edge of upper arm and the inward flange of underarm respectively, same feeder cable 8 passes that battalion 11 is led at the center and hole from it passes, enter down main element radiating element 3 ', to the upper arm lower limb, internal and external conductor is welded on upper arm lower limb and underarm inward flange respectively along its underarm inward flange.

Description of drawings

Fig. 1 is the structural representation of the invention embodiment;

Fig. 2 is the cut-away view of the invention embodiment;

Fig. 3 is the sectional view of the invention embodiment;

Fig. 4 is the sectional view of the invention embodiment;

Lawn lamp omnidirectional antenna two unit description of drawings

Sequence number	Title	Quantity
				1	The location loam cake	1
2	Outer adjustment sheet	6
			3	Main element (on)	1
3′	Main element (descending)	1
			4	The outer adjusting loads	1
5	Interior adjustment sheet	2
			6	Feed Ba Lun	2
7	Divide feeder line 1	6
			8	Divide feeder line 2	1
9	The one-to-two power splitter	1
			10	Box at the bottom of the one-to-two power splitter	1
11	Support copper pipe	1
			12	Main feeder	1
13	The floor, location	1
			14	Radome	1
15	Distributing point 1	1
			16	Shielding layer grounding 1	1
17	Distributing point 2	1
			18	Shielding layer grounding 2	1
19	Illuminating line	1

Below in conjunction with drawings and Examples the utility model is further described.

In electronic apparatus systems such as modern communications, the antenna system that uses is various, its middle sleeve element antenna has obtained using widely with its good broadband character, but its broadband character does not satisfy the employed frequency range of present mobile communication (800-2500MHz) far away, simultaneously, similar with common even element antenna, the total length of sleeve idol element antenna is taken as the half-wavelength of working frequency range lower frequency limit correspondence usually, and this programme is in order to adapt to the demand of miniaturization, the actual size that adopts is much smaller than λ max/2, (λ max makes wavelength for corresponding farm labourer), we are in omni-directional array antenna, unit its length of coaxial sleeve antenna that adopts is 100mm, much smaller than the length of normal λ max/2=183.5mm.Traditional series feed mode can't satisfy the full frequency band directional diagram and not distort in the broadband omni-directional array antenna, so adopt constant amplitude to avoid the distortion of elevation radiation patytern effectively with equidistant from distance feed (adopting it in the above array of binary) in this programme.Because the electrical characteristics of antenna depend on the relation of tube-in-tube structure and the earth, blank pipe in this programme in the tool has multiple action: as the supporting mechanism of polynary oscillator radiator, as the special ground of antenna, again as the inner wire of coaxial sleeve oscillator, so just satisfied the demand of the high antenna of frame in the actual engineering, feeder line moves towards in middle the heart-nutriment, reduced the influence of feeder line to antenna element, this coaxial (coaxial) mechanism extremely helps the impedance matching of antenna in broadband, the global design scheme is embodied in accompanying drawing 1 basically, in the accompanying drawing 2, signal from communication equipment links together through the input port that main feeder 12 passes location-plate 13 and one-to-two power splitter 9, the output port of power splitter 9 is divided into two-way, give main element 3 and following main element 3 ' feed on two radiating elements through feeder cable 7 and 8 respectively, feeder cable 7 and 8 equal in length, giving up and down, two radiating elements are equal to feed, they enter wherein by the hole of supporting on the copper pipe 11, the feeder cable 7 underarm edge that passes main element 3 on the radiator enters in the sleeve oscillator then, to the upper arm its lower edge, its internal and external conductor is welded on the edge of upper arm and the inward flange of underarm respectively, same feeder cable 8 passes support copper pipe 11 and hole from it passes, enter main element 3 ' under the radiator, along its underarm inward flange to the upper arm lower limb, internal and external conductor is welded on upper arm lower limb and underarm inward flange respectively, like this after the signal from communication equipment enters main feeder 12, newly there is radiating doublet all to be energized, and on radiating doublet, induce surface current, and then radiated electromagnetic wave, pass the PVC radome that surrounds radiator, propagate into free space and go.In addition, the upper arm of main element extends to outer adjustment sheet 2, end adds short-circuit piece 4, so just reach the effect of full frequency band coupling, the bottom surface middle part of main element is stretched out sheet probe 5 and is stretched in the underarm, but do not contact underarm, the upper end of last main element 3 is inserted to go up to locate and is covered in 1, and positioning plate 13 inserts in the radomes 14 and carries out capping.One-to-two power splitter 9 is loaded at the bottom of the one-to-two power splitter in the box 10.Among the figure, 6 is feed Ba Lun; 15 is that distributing point 1,16 is a shielding layer grounding 1; 17 is that distributing point 2,18 is a shielding layer grounding 2; 19 is illuminating line.In addition, this programme also has following innovative characteristics:

Oscillator radiator distributed load technology

For the impedance matching property that improves low frequency end as shown in Figure 2, be mountain font extension socket outer wall at last in mountain word top short circuit at sleeve oscillator upper arm, this measure make standing-wave ratio reduce to＜1.5, played the effect of fine setting, so just make that underarm becomes a kind of dissymmetrical structure on the sleeve oscillator, effectively guaranteed broadband character, the mountain font accounts for 1/2 circle for best.

Compensation technique in the radiator reactance

As shown in Figure 2, stretch out a sheet probe to the inwall of bottom main element at main element lower surface medium position, sheet probe does not contact with sleeve oscillator underarm end face, presents upright vacant state, this measure has further improved high frequency characteristics, makes VSWR＜1.4 of high frequency

Though the invention with preferred embodiment openly as above; but they are not to be used for limiting the invention; anyly have the knack of this skill person; in the spirit and scope that do not break away from the invention; from when can doing various variations or retouching, so being as the criterion of should being defined with the application's claim protection range of the protection range of the invention.

Claims (2)

1, a kind of broadband omni-directional antenna, it is characterized in that: the input port that main feeder (12) passes location-plate (13) and one-to-two power splitter (9) links together, the output port of described one-to-two power splitter (9) is divided into two-way, pass through feeder cable (7) and (8) respectively and give two radiating elements (3) and (3 ') feed, the underarm edge that described feeder cable (7) passes radiating element (3) enters in the sleeve oscillator, to the upper arm its lower edge, its internal and external conductor is welded on the edge of upper arm and the inward flange of underarm respectively, battalion (11) is led at same feeder cable (8) center of passing and hole from it passes, enter radiating element (3 '), to the upper arm lower limb, internal and external conductor is welded on upper arm lower limb and underarm inward flange respectively along its underarm inward flange.

2, broadband omni-directional antenna according to claim 1 is characterized in that, described feeder cable (7) and (8) equal in length, and two radiating elements are equal to feed about giving, and the hole that they are led in the battalion (11) by the center enters wherein.

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