CN104269616B

CN104269616B - The rectangular microstrip antenna of higher mode is worked in Mobile solution

Info

Publication number: CN104269616B
Application number: CN201410475182.8A
Authority: CN
Inventors: 潘锦; 邹孟; 李品; 陈兆丰; 张翔; 崔元善
Original assignee: University of Electronic Science and Technology of China
Current assignee: HEBEI JINGHE ELECTRONIC TECHNOLOGY CO LTD
Priority date: 2014-09-17
Filing date: 2014-09-17
Publication date: 2017-10-17
Anticipated expiration: 2034-09-17
Also published as: CN104269616A

Abstract

The rectangular microstrip antenna of higher mode is worked in a kind of Mobile solution of the disclosure of the invention, belongs to wireless communication technology field.It is an object of the invention to propose one kind using rectangular microstrip antenna TM₀₂And TM₂₀The method that pattern produces omni-directional conical lobe figure (OCBP).The antenna includes cylinder shape medium substrate, located at the positive radiant body of dielectric substrate, the earth plate located at the dielectric substrate back side and two coaxial probes fed to antenna.Encouraged by dual-port constant amplitude in-phase current and the appropriate selection of annular slot produces TM₀₂And TM₂₀Pattern, and reach the higher isolation of two-port and good impedance matching.The present invention ensure that the simplification of antenna form and feed structure while target is realized, with high use value and application prospect.

Description

The rectangular microstrip antenna of higher mode is worked in Mobile solution

Technical field

The invention belongs to wireless communication technology field, and in particular to one kind works in TM₀₂And TM₂₀The omnidirectional radiation of pattern Rectangular microstrip antenna.

Background technology

With developing rapidly for modern information technologies, mobile communication technology is more and more deep into daily life In.As a crucial part in GSM, the quality of antenna (transmitting/reception) directly affects communication quality. So, particularly important aobvious to the raising of mobile communication quality and the progress of technology of the antenna of a excellent performance.Since previous generation Discipline the seventies, microstrip antenna by researchers for the first time develop, just with its lightweight, small volume, low cost, planar structure, can With with integrated circuit it is compatible many advantages, such as and paid close attention to and favored by each side personage.However, a there is low section to minimize height The design of the omnidirectional radiation microstrip antenna of gain characteristic is still with very big challenge and researching value.

By the retrieval discovery to prior art literature, with omni-directional conical lobe figure (Omnidirectional Conical Beam Pattern, OCBP) microstrip antenna because its gain higher relative to traditional antenna and radiation orientation on The advantages of 360 degree of omnidirectionals cover, enjoys high praise in GSM design always.Son, S.-H., Jeon, S.-I. et al. It is published within 2010 IEEE Transactions on Antennas and Propagation article " GA-based Design of multi-ring arrays with omnidirectional conical beam pattern " and Zuo, S.L. et al. were published in Electron.Letter article " Enhanced bandwidth of low- in 2010 Profile sleeve monopole antenna for indoor base station application " difference is never Same side elaborates this problem.Juhua Liu, Quan Xue et al. is published in 2013IEEE Transactions on Article " Design and analysis of a low-profile and on Antennas and Propagation Broadband microstrip monopolar patch antenna " elaborate the TM of Circular Microstrip Antennas₀₁, TM₀₂, TM₂₁ And other higher modes can produce the mechanism of omni-directional conical lobe figure (OCBP).Nineteen ninety-five, Batchelor, the human hair such as J.C. Article " Microstrip ring antennas of the table on IEE Proc.Microwave Antennas Propagation Operating at higher order modes for mobile communications ", which are proposed, utilizes circular ring structure The TM of antenna₂₁Pattern produces omni-directional conical lobe figure (OCBP).

However, utilizing the TM of rectangular microstrip antenna₀₂And TM₂₀Pattern produces the design of omni-directional conical lobe figure (OCBP) Also it is rarely reported.Therefore, it is conceived to the TM of rectangular microstrip antenna₀₂And TM₂₀Pattern produces the day of omnidirectional's conical lobe figure (OCBP) The work that line design is still highly studied.

The content of the invention

It is an object of the invention to propose one kind using rectangular microstrip antenna TM₀₂And TM₂₀Pattern produces omni-directional conical wave The method of valve figure (OCBP).The antenna utilizes two coaxial probe constant amplitude in-phase current excitation TM₀₂And TM₂₀Pattern is complete to produce Tropism conical lobe figure.This method, which is advantageous in that, can realize two higher isolations in port and good impedance Match somebody with somebody.

The present invention is achieved by the following technical solutions：The rectangular microstrip day of higher mode is worked in a kind of Mobile solution Line, including cylinder shape medium substrate, located at the positive radiant body of dielectric substrate, the earth plate located at the dielectric substrate back side and to day Two coaxial probes that line is fed, it is characterised in that the earth plate is the circular metal of overwrite media base lower surface Earth plate.

The outer conductor connection earth plate of the coaxial probe, inner wire passes through medium substrate and the distributing point phase on radiant body Connection.

The radiant body is to be provided with two distributing points on square-shaped metal paster, radiant body, and distributing point is on radiant body Diagonal is symmetrical, and being etched with respectively centered on two distributing points in a size identical annular slot, gap does not have metal object Matter.

The present invention enters row energization using two coaxial probe constant amplitude in-phase currents to antenna.By adjusting two feed ports Position and radiation patch on the size of annular slot width reach two higher isolations in port and good impedance Match somebody with somebody.

Compared to the prior art, its improvement to structure and performance is positive and obvious to the present invention.Pass through dual-port etc. Width in-phase current is encouraged and the appropriate selection of annular slot produces TM₀₂And TM₂₀Pattern, and reach the higher isolation of two-port With good impedance matching.The present invention ensure that the simplification of antenna form and feed structure while target is realized, With high use value and application prospect.

Brief description of the drawings

Fig. 1 (a) is positive structure schematic of the embodiment of the present invention；

Fig. 1 (b) is side structure schematic diagram of the embodiment of the present invention；

Fig. 2 is the two-port return loss of the embodiment of the present invention and emulation and the measured result schematic diagram of isolation；

Fig. 3 (a) is x-z face Direction Pattern Simulation result schematic diagram of the embodiment of the present invention in 3.81GHz；

Fig. 3 (b) is that the embodiment of the present invention is illustrated in the horizontal radiation pattern simulation result of 3.81GHz 55 degree of horizon elevation angle Figure；

Fig. 4 is the gain simulation result schematic diagram of the embodiment of the present invention.

Fig. 5 is the radiation efficiency simulation result schematic diagram of the embodiment of the present invention.

Drawing reference numeral explanation：1. dielectric substrate, 2. distributing points, 3. distributing points, 4. radiant bodies, 5. earth plates, 6. annulus seam Gap, 7. coaxial probes.

Embodiment

The embodiment to the present invention is described in further detail below in conjunction with the accompanying drawings.

Example structure schematic diagram such as Fig. 1 of the rectangular microstrip antenna of higher mode is worked in the Mobile solution of the present invention (a) and shown in Fig. 1 (b), the antenna includes a cylinder shape medium substrate 1, antenna feed point 2,3, located at dielectric substrate front The radiant body 4 of center, two coaxial probes 7 fed located at the earth plate 5 at the dielectric substrate back side and to antenna, with The annular slot 6 etched centered on two distributing points.

In Fig. 1, a diameter of d=100mm for the cylinder shape medium substrate 1 that the relative dielectric constant that thickness is 2mm is 2.2； The size of dielectric substrate head-on radiation body 4 is a=b=50mm；Antenna feed point 2,3 arrives center position l=13mm；Annulus The radius in gap 6 is r_s=3.5mm, gap width is w_s=0.2mm.The selection of specific size is only the embodiment of the present invention herein In it is selected, for those skilled in the art, size that can be according to actual needs to each several part carries out appropriate tune It is whole.

The present invention adjusted by adjusting the position of distributing point 2,3 and the size of annular slot 6 antenna current feed port every From degree and impedance matching.

Emulation and the measured curve of embodiment two-port return loss and isolation are as shown in Fig. 2 the impedance band of port 1,2 Wide measured value is 2.1% (3.78-3.85GHz), and two-port isolation measured value is better than-20dB in impedance bandwidth.

Embodiment is shown in 3.81GHz x-z faces Direction Pattern Simulation result such as Fig. 3 (a), it can be seen that gain maximum The elevation angle be 55 degree when, cross polarization ratio is on 20dB.

Embodiment is shown in horizontal radiation pattern simulation result such as Fig. 3 (b) of 3.81GHz 55 degree of horizon elevation angle, antenna Preferably, directional diagram out-of-roundness is only 0.9dB to omni-directional.

The gain simulation result of embodiment as shown in figure 4, antenna maximum gain is in 5.80dBi in impedance bandwidth, now Frequency is 3.81GHz.

The radiation efficiency simulation result of embodiment as shown in figure 5, antenna in impedance bandwidth shows maximum radiation efficiency 0.99 More than, average radiation efficiency is more than 0.96.

The simulation result of the embodiment shows that the antenna has reached the requirement of high-gain omni-directional conical lobe well, In addition the antenna structure is simple, feed is convenient, compact conformation, with good application value.

Claims

1. work in the rectangular microstrip antenna of higher mode in a kind of Mobile solution, including cylinder shape medium substrate, located at medium base The positive radiant body of piece, the earth plate located at the dielectric substrate back side and two coaxial probes fed to antenna, its feature It is, the earth plate is the round metal grounding plate of overwrite media base lower surface, the radiant body pastes for square-shaped metal Two distributing points are provided with piece, radiant body, distributing point is symmetrical on radiation body diagonal, centered on two distributing points respectively A size identical annular slot is etched with, during work, two coaxial probe constant amplitudes encourage TM with mutually feeding₀₂And TM₂₀Pattern To produce omni-directional conical lobe figure.

2. the rectangular microstrip antenna of higher mode, the coaxial probe are worked in a kind of Mobile solution as claimed in claim 1 Outer conductor connection earth plate, inner wire is connected through medium substrate with the distributing point on radiant body.

3. the rectangular microstrip antenna of higher mode, the annular slot are worked in a kind of Mobile solution as claimed in claim 1 Interior no metallics.