• Title, Summary, Keyword: Microstrip-fed antenna

Search Result 186, Processing Time 0.037 seconds

CPW-fed to CPS Dipole Antenna of Microstrip Tapered Balun with Triangular Loop Director

  • Lee, Hyeonjin
    • Journal of Electrical Engineering and Technology
    • /
    • v.9 no.4
    • /
    • pp.1365-1368
    • /
    • 2014
  • A CPW-fed to CPS dipole antenna of triangular loop director by microstrip tapered balun is proposed for dual and wide band operations, in this paper. The proposed antenna is consisted of a CPW-fed to CPS transform, microstrip tapered balun element, CPS dipole driver and triangular loop director. A dual and wide bandwidth of the proposed dipole antenna is realized by introducing the triangular loop director and taper matching element. The operated frequency bandwidth is 1GHz (2.14~3.14 GHz) and 1.9 GHz (4.6~6.5 GHz) to return loss criterion of less than 10 dB. The measured return loss of the proposed antenna showed good results of the dual and wide band operating frequency and the radiation pattern. The proposed antenna is able to support WLAN wireless communications applications.

A Study on Inset Fed Microstrip Antenna Loaded with Complementary Single Loop Resonator (CSLR을 갖는 인셋 급전 마이크로스트립 안테나에 관한 연구)

  • Hong, Jae-Pyo;Kim, Byung-Mun
    • The Journal of the Korea institute of electronic communication sciences
    • /
    • v.9 no.8
    • /
    • pp.921-926
    • /
    • 2014
  • In this paper, the characteristics of inset fed microstrip antenna loaded with CSLR(complementary single loop resonator) are studied. Effective permeability parameters of the SLR unit cell is retrieved from simulated scattering parameters, and structure parameters of the SLR unit cell are selected so that effective permeability is negative value at the operating frequency. The optimized inset fed microstrip antenna loaded with SLR for a $3{\times}3$ array in the ground plane of a conventional patch antenna is designed and simulation results of return loss and radiation pattern are shown. At resonant frequency 2.82 GHz, the overall dimension of the proposed antenna is reduced by approximately 56.8% compared to the conventional inset fed antenna. Simulation results are obtained by 3D FEM solver(Ansoft's HFSS).

Optimized Design of T-Shaped Microstrip Antenna with Various Dimensions (T형 마이크로스트립 안테나의 면적 비에 따른 최적 설계)

  • Kim, Jin-Bok;Lee, Joong-Geun
    • Journal of the Institute of Electronics Engineers of Korea TC
    • /
    • v.47 no.5
    • /
    • pp.53-59
    • /
    • 2010
  • There are various types of antenna fed method; coaxial probe, coupling, parasitic elements, and impedance matching. In this paper, the fed method of the proposed antenna is microstrip line type. The high frequency structure simulator (HFSS) is used to analyze the characteristics of the T-shaped microstrip antenna with various patch dimensions. In comparison with the basic microstrip antenna, this proposed T-shaped microstrip antenna with 40.38 % of patch dimensions has the optimum characteristics of resonant frequency, return loss, and radiation pattern at 2.0 GHz band.

Improve Matching for Rectangular Slot Antenna by Parasitic Slots

  • Anantrasirichai, N.;Satthamsakul, S.;Rakluea, P.;Wakabayashi, T.
    • 제어로봇시스템학회:학술대회논문집
    • /
    • /
    • pp.1676-1679
    • /
    • 2003
  • A perfect matching is the desire of antenna designers. In this paper, we improve the matching of antenna designing. In general, the efficiency of antennas has many improvements. In this paper, we choose to extend matching by adding the slots in the basic microstrip-fed rectangular slot antenna. We called it as "parasitic slots". The dominant characteristic of this addition is double efficient improvement matching and other characteristics of antenna are similar. It means that the microstrip-fed rectangular slot antenna with parasitic slots has all characteristics as same as the microstrip-fed rectangular slot antenna without parasitic slots. The antenna with parasitic slots has better matching better than the antenna without parasitic slots.

  • PDF

Design of a Dual-fed Microstrip Patch Antenna (이중급전 마이크로스트립 패치 안테나 설계)

  • Lee, Jong-Ig;Yeo, Junho;Kim, Gun-kyun;Rhee, Seung-Yeop
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
    • /
    • /
    • pp.79-80
    • /
    • 2016
  • In this paper, we considered a design method for a microstrip patch antenna fed through two radiating edges by two feeding microstrip lines. Two feedlines are made to have a phase difference of 180 degree with each other in order to reduce cross-polarization level radiated from the antenna. The operation principle and design procedure for the considered antenna are explained using equivalent circuits. In order to check the validity of this study, the results for reflection coefficients of the antenna obtained by the proposed equivalent circuit method and the simulation using commercial antenna design tool are compared with each other.

  • PDF

An Inset-Fed Microstrip Patch Antenna Having Modified Feeding Structure in the S-Band (급전구조를 변형한 5-Band용 INSET-FED 마이크로스트립 패치 안테나)

  • 정동근;이석문;하천수
    • Journal of the Korea Institute of Information and Communication Engineering
    • /
    • v.6 no.6
    • /
    • pp.897-903
    • /
    • 2002
  • In this paper, a modified feeding structure for microstrip patch antenna is suggested for improving the performances. The proposed antenna has a gap between the transmission line and the recessed part of the radiating patch which makes a capacitive coupling. It shows higher 511(-l4dB) and lower cross polarization level(-2OdB) compare with the conventional inset ftd patch antenna while having a similar characteristics in another evaluating items. Experimental results are examined and considered to apply to the S-Band application, and the effectiveness has been confirmed by FDTD simulation and measurement simultaneously.

Inset Fed Microstrip Patch Antenna for Wireless Communication at 2.45 GHz (2.45 GHz에서 무선 통신 시스템을 위한 인셋 페드 마이크로스트립 패치 안테나)

  • Pradhan, Sajina;Choi, Dong-You
    • Journal of the Korea Institute of Information and Communication Engineering
    • /
    • v.18 no.8
    • /
    • pp.1785-1790
    • /
    • 2014
  • In communication systems, there are various types of microstrip antenna that can be used for many applications. This paper mainly focuses on the simple design of inset fed rectangular microstrip patch antenna to operate at frequency of 2.45 GHz for wireless communication. The study involves using HFSS simulator to design the antenna dimensions and to determine its performance. This antenna is based on a thickness of 1.6mm Teflon substrate with a dielectric constant of approximately 2.2, on one side of the substrate and another side has a ground plane. After simulation, the antenna performance characteristics such as return loss, VSWR, gain, radiation pattern are obtained.

The Wide-band Two-element Microstrip Slot Array Antenna with the Cross-shaped Feedline

  • Shin, Ho-Sub;Kim, Nam;Jang, Yong-Woong
    • Proceedings of the IEEK Conference
    • /
    • /
    • pp.163-166
    • /
    • 2000
  • The design, numerical simulation, and an experimental implementation of two-element cross-shaped microstrip line-fed printed slot array antenna for IMT-2000 at the 2.0 GHz band is presented in this paper. The proposed antenna with relative permittivity 4.3 and thickness 1.0mm is analyzed by the Finite-Difference Time-Domain (FDTD) method. It was shown that the measured 2.0 VSWR bandwidth of one-element microstrip slot antenna is from 1.42 GHz to 2.69 GHz, which is approximately 61.8% and that of two-element microstrip slot array antenna is from 1.42 GHz to 2.56 GHz, which is approximately 57.3% And it was shown that the measured gain of one-element microstrip slot antenna is 2.75 dBi and that of two-element microstrip slot antenna is 4.75 dEi. The antennas were fabricated and tested. The measured results are in good agreements with the FDTD results.

  • PDF

Compact Microstrip-Fed Square Loop Antenna for DTV Applications

  • Yeo, Junho;Lee, Jong-Ig
    • Journal of information and communication convergence engineering
    • /
    • v.14 no.4
    • /
    • pp.222-226
    • /
    • 2016
  • A design method for a compact square loop antenna fed by a microstrip (MS) line for indoor digital television (DTV) applications is proposed. The proposed antenna consists of a square loop, circular sectors, and an MS line. The square loop combined with circular sectors is printed on one side of a substrate, and a $75-{\Omega}$ MS line is printed on the other side. The circular sectors are used as a wideband balun or transition to connect the MS line and the square loop. A prototype of the proposed square loop antenna operating in the DTV band (470-806 MHz) is designed and fabricated on an FR4 substrate. Experimental results show that the proposed antenna has the desired impedance characteristics in the frequency band of 464-1,220 MHz (89.8%) for a voltage standing wave ratio (VSWR) of <2 covering the DTV band, and a broadside gain of 0.8-3.3 dBi in the DTV band.

Input Impedance of the Stcked Microstrip Patch Antenna Using the the cavity Model (캐버티 마들을 이용한 적층 마이크로스트립 안테나의 입력 임피던스)

  • 임기남;이경우이상설
    • Proceedings of the IEEK Conference
    • /
    • /
    • pp.339-342
    • /
    • 1998
  • The stacked microstrip patch antenna is modeled by a simple cavity model. Using this model, the input impedance of the stacked microstrip patch antenna fed by a coaxial probe is expressed as a function of antenna paprameters and frequency. We calculate the input impedance of the stacked microstrip patch antenna for the variation of frequency.

  • PDF