CN201256181Y

CN201256181Y - Novel antenna

Info

Publication number: CN201256181Y
Application number: CNU2008201853139U
Authority: CN
Inventors: 邢红兵; 徐燕; 李渠塘
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-09-19
Filing date: 2008-09-19
Publication date: 2009-06-10
Anticipated expiration: 2018-09-19

Abstract

The utility model relates to a novel antenna, wherein a main feeder (7) is connected with a microstrip type wide frequency converter (11) with impedance, the converter (11) changes the impedance of a concentric feeder (12) into a low impedance to feed for a quaternary notch antenna, the output end of the microstrip type wide frequency converter (11) passes by a section of rigid coaxial transmission connection line section (10), the transmission connection line section (10) passes through the center of a lower radiation fin (3), an inner conductor of the transmission connection line section (10) is connected with a center point of a notch antenna excitation area (15) and an upper radiation fin (1) together, gaps are arranged between the upper radiation fin (1) and the lower radiation fin (3), and the upper radiation fin (1) and the lower radiation fin (3) are jointly stuck on a dielectric substrate (4). The lower radiation fin (3) and a metal floor (5) are connected together, the lower surface of the floor (5) is placed with a plastic mounting fixed plate (6), and the upper radiation fin (1) and the lower radiation fin (3) are directly crossed with other one upper radiation fin (1) which is completely same to the upper radiation fin (1).

Description

New antenna

Technical field

The utility model relates to a kind of new antenna.Be used for mobile communication system as indoor covering and outdoor cell embellished antenna low, medium gain.

Background technology

There is following defective in the antenna of at present same purposes: (1) requires the gain of antenna higher at present, such as the gain that 4-6dBi will be arranged, and existing domestic aerial, be installed in below, its technology is traditional one pole or bipolar system antenna, so its directional diagram is equal up and down, in practicality, all all wastes on ceiling of electric wave up, so its gain is lower, have only 2-3dBi, and frequency is narrow, can make signal level low with low-gain antenna like this, thereby influence communication quality.(2) present indoor ceiling type antenna and outdoor cell cover antenna majority are omni-directional pattern, upper half-space has the energy loss of significant proportion to fall, and the user wishes to adopt the broad beam directional antenna, and front and back equal to have utilized limited energy fully on the one hand than high, have improved the aerial radiation gain, make the communication space Energy distribution even on the other hand, eliminated the blind area, communication environment is good, and present ceiling mount antenna and sub-district cover antenna do not satisfy this requirement.(3) more and more higher to the requirement of communication band width, present ceiling type antenna and sub-district cover antenna mostly do not satisfy this requirement, and particularly the broadband gain does not reach requirement.

The utility model content

The purpose of this utility model is to overcome the deficiency of above-mentioned prior art and a kind of higher gain that obtains is provided, and working band is wide, and level distribution is even, improves the small and exquisite simple new antenna of communication quality.

Main feeder 7 of the present utility model is connected with microstrip-type wide band impedance transformer 11, microstrip-type wide band impedance transformer 11 becomes the impedance conversion of coaxial feeder 12 Low ESR to give quaternary recess antenna feed, the output of microstrip-type wide band impedance transformer 11 connects line segment 10 through one section rigidity coaxial transmission, transmission link section 10 is passed down the central authorities of radiation fin 3, the central point and the last radiation fin 1 of the excitation region 15 of the inner wire of transmission link section 10 and recess antenna link together, in the middle of last radiation fin 1 and the following radiation fin 3 slit is arranged, and be affixed on jointly on the dielectric substrate 4, the slit is respectively pressed index by last radiation fin 1 and following radiation fin 3 and is launched, following radiation fin 3 links together with metal quality plate 5, place a plastic mounting fixed head 6 below the floor 5, mounting plate 6 inserts in the radomes 8, and last radiation fin 1 and following radiation fin 3 quadratures have and the identical radiation fin 1 on another of last radiation fin 1.Last radiation fin 1 and following radiation fin 3 progressively launch according to exponential curve, and the equation of exponential curve is y=± Ae ^Px+ B, wherein y is half of separation, and A is a constant, is decided by the position that radiation begins, and is 0.45-0.95, and p is an amplification factor, is 0.008-0.06, and x is the extension position of groove center line, B is the size displacement parameter, can be made as zero.Increase synchronously about the width of last radiation fin 1 and following radiation fin 3.Last radiation fin 1 is different with the shape of following radiation fin 3 figurations.Microstrip-type wide band impedance transformer 11 is to connect line segment 10 straight-line extensions along coaxial transmission.

Beneficial effect: (1) the utility model utilizes the electric wave conduction principle that electric wave is guided to emission port gradually, the groove district comprises line of rabbet joint excitation region 15, transmission range 13, radiation area 14, because electric wave is along the aspect emission of guiding, its directional diagram concentrates on recess direction and environs, so have higher gain, exceed about 3dB than the gain of common antenna.(2) the utility model utilizes the electric wave conduction principle, sheet metal separates gradually in the groove district, high frequency is far launched because of metal separation earlier, low frequency can be delayed to the greatest irradiation bore near radiation area, the shape of same substrate is also identical with radiation fin, its working band is very wide thus, can cover present GSM net, CDMA net, 3G and Blue Bird technical work frequency range, and every index is all very good.(3) the utility model is omnidirectional antenna basically, can be installed in the plastic barrel and its gain height of the radome internal cause of Any shape, and pattern shapes is more satisfactory, directional diagram covers whole space, non-blind area, and level distribution is more even, improve communication quality greatly, improved communication environment.And the shape that presents small and exquisite spirit dragon.

Figure of description

Fig. 1 is a Facad structure schematic diagram of the present utility model;

Fig. 2 is a side structure schematic diagram of the present utility model.

Embodiment

Below with reference to drawings and Examples the technical solution of the utility model is described in detail.

Fig. 1, Fig. 2, wherein 1 is last radiation fin, 3 are following radiation fin, 4 is dielectric substrate, and 5 is the floor, and 6 is mounting plate, 7 is main feeder, and 8 is radome, 9 distributing points, 10 is the transmission line linkage section, 11 is the microstrip-type wide band impedance transformer, and 12 is coaxial feeder, and 13 is transmission range, 14 is radiation area, and 15 is excitation region.

50 Ω main feeders 7 connect microstrip-type wide band impedance transformer 11, the effect of microstrip-type wide band impedance transformer 11 is to become the impedance conversion of coaxial feeder 12 Low ESR to give quaternary recess antenna feed, the output of microstrip-type wide band impedance transformer 11 connects line segment 10 through one section special rigidity coaxial transmission, transmission link section 10 is passed down the central authorities of radiation fin 3, the central point and the last radiation fin 1 of the excitation region 15 of the inner wire of transmission link section 10 and recess antenna link together, slit in the middle of last radiation fin 1 and the following radiation fin 3 is the line of rabbet joint, be affixed on jointly on the dielectric substrate 4 and fixed, apex drive at the line of rabbet joint, the slit is respectively pressed index by last radiation fin 1 and following radiation fin 3 and is launched, form gradual change type line of rabbet joint antenna, the center is an excitation region 15, through transmission range 13, to radiation area 14, about be symmetrical, Here it is concave-concave mouth antenna, when it is upright with regard to radiation vertical line polarized wave, the following radiation fin 3 in slit is a ground connection, for making down radiation fin 3 ground connection reliably, its bottom curves the right angle, so that link together with metal quality plate 5, for easy for installation, place a plastic mounting fixed head 6 below the floor 5, mounting plate 6 inserts in the radome 8, in order to make horizontal radiation pattern more even, last radiation fin 1 and following radiation fin 3 quadratures have and the identical radiation fin 1 on another of last radiation fin 1.

Last radiation fin 1 and following radiation fin 3 progressively launch according to exponential curve, and the equation of exponential curve is y=± Ae ^Px+ B, wherein y is half of separation, and A is a constant, is decided by the position that radiation begins, and is 0.45-0.95, and p is an amplification factor, is 0.008-0.06, and x is the extension position of groove center line, B is the size displacement parameter, can be made as zero.Increase synchronously about the width of last radiation fin 1 and following radiation fin 3.

In order to reduce radiation fin to the incident wave reflection, its shape is to take the shape of certain figuration, simultaneously, does not upwarp in order to make wave beam, concentrates on horizontal direction, and last radiation fin 1 can be different with the shape of following radiation fin 3 figurations.

The placement of microstrip-type wide band impedance transformer 11 can be to connect line segment 10 straight-line extensions along coaxial transmission, also can curve stick together parallel with ground plate, also can curve certain angle and be tilting state.

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

Claims

1, a kind of new antenna, it is characterized in that: main feeder (7) is connected with microstrip-type wide band impedance transformer (11), microstrip-type wide band impedance transformer (11) becomes the impedance conversion of coaxial feeder (12) Low ESR to give quaternary recess antenna feed, the output of microstrip-type wide band impedance transformer (11) connects line segment (10) through one section rigidity coaxial transmission, transmission link section (10) is passed down the central authorities of radiation fin (3), the central point and the last radiation fin (1) of the excitation region (15) of the inner wire of transmission link section (10) and recess antenna link together, the slit is arranged in the middle of last radiation fin (1) and the following radiation fin (3), and be affixed on jointly on the dielectric substrate (4), the slit is respectively pressed index by last radiation fin (1) and following radiation fin (3) and is launched, following radiation fin (3) links together with metal quality plate (5), place a plastic mounting fixed head (6) below the floor (5), mounting plate (6) inserts in the radome (8), and last radiation fin (1) and following radiation fin (3) quadrature have and the identical radiation fin (1) on another of last radiation fin (1).

2, new antenna according to claim 1 is characterized in that: go up radiation fin (1) and following radiation fin (3) and progressively launch according to exponential curve, the equation of exponential curve is y=± Ae ^Px+ B, wherein y is half of separation, and A is a constant, is decided by the position that radiation begins, and is 0.45-0.95, and p is an amplification factor, is 0.008-0.06, and x is the extension position of groove center line, B is the size displacement parameter, can be made as zero.

3, according to the described new antenna of claim, it is characterized in that: upward increase synchronously about the width of radiation fin (1) and following radiation fin (3).

4, new antenna according to claim 1 is characterized in that: upward radiation fin (1) is different with the shape of following radiation fin (3) figuration.

5, new antenna according to claim 1 is characterized in that: microstrip-type wide band impedance transformer (11) is to connect line segment (10) straight-line extension along coaxial transmission.