• Title, Summary, Keyword: Microstrip structure

Search Result 525, Processing Time 0.037 seconds

Improved Coplanar Waveguide-to-Microstrip Right-Angled Transition using an Offset Microstrip Section (Offset Microstrip을 이용한 Coplanar Waveguide-to-Microstrip Right-Angled 전이의 특성 개선)

  • 이맹열;이해영
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
    • /
    • v.13 no.5
    • /
    • pp.445-450
    • /
    • 2002
  • We analyzed and measured a CPW(coplanar waveguide)-to-microstrip right-angled transition. Asymmetric CPW-to-microstrip transitions show significant resonances by the slot mode generation at the discontinuities. The air-bridge just shifting the resonance frequency can not fundamentally suppress the occurrence of the slot mode. So, we proposed the structure using offset microstrip section to eliminate the resonance. The proposed structure may be useful for the application of multi-layed structure.

A Novel PBG structure LPF for Performance improvement of Microstrip Circuits. (마이크로스트립 회로 성능 개선을 위한 새로운 PBG 구조의 LPF)

  • 김태선;서철헌
    • The Journal of Korean Institute of Communications and Information Sciences
    • /
    • v.25 no.3A
    • /
    • pp.430-434
    • /
    • 2000
  • In this paper, a novel photonic bandgap(PBG) structure is proposed for increasing stropband of lowpass filter without the size increment of circuit for application in microstrip circuits. The proposed structure is connected in parallel two periodic structures which have different center frequency of the stopband. The wide stopband is achieved by two periodic structures of two different stopbands. We also show the performance improvement of microstrip patch antenna by etching of the proposed structure in ground plane.

  • PDF

Design and Implementation of Koch curve Microstrip Patch Antenna for Antenna Miniaturization (안테나 소형화를 위한 koch curve 마이크로스트립 패치 안테나 설계 및 구현)

  • Kim, Sun-Woong;Lim, Dong-Seob;Kim, Young-Gon;Choi, Dong-You
    • Journal of Information Technology Services
    • /
    • v.12 no.3
    • /
    • pp.323-330
    • /
    • 2013
  • In this paper, miniaturized patch antenna operating at ISM band has been designed by applying the fractal technique. Various type of antenna structure, microstrip patch antenna and koch curve microstrip patch antenna has been proposed and simulated using Ansoft HFSS (High Frequency Structure Simulator). The area of microstrip patch antenna and koch microstrip patch antenna is 1,058 $mm^2$, and 891 $mm^2$ respectively, showing the size reduction ratio of 16%. The finally made koch curve microstrip patch antenna resonates at 2.45GHz with return loss of 22.69dB, VSWR of 1.2142, and antenna radiation gain of 3.26dBi.

Analysis of Rectangular Microstrip Patch Antennas with the Multilayered Structure and the Electromagnetically Coupled Feed Structure (다층구조와 전자장결합 급전구조를 갖는 사각형 마이크로스트립 패치안테나의 해석)

  • 정문희;남상욱
    • Journal of the Korean Institute of Telematics and Electronics A
    • /
    • v.31A no.2
    • /
    • pp.18-25
    • /
    • 1994
  • In this papaer, the input impedance of the rectangular microstrip patch antennas with the multilayered structure is analysed by using the moment method technique in the spectral domain. The analysis is carried out for two different feeding structures : directfeeding structure and electromagnetic-feeding structure. In order to obtain the accurate input impedance, the current distribution on the microstrip feed line is modeled by the quasi-TEM travelling wave and the PWS(piecewise sinusoidal) mode. The input impedances of the designed microstrip antennas are measured and compared with the calculation. which shows a good agreement.

  • PDF

A Novel Feed Structure for a Broadband Microstrip Circular Slot Antenna (광대역 마이크로스트립 원형 슬롯 안테나를 위한 새로운 급전 구조)

  • 서영훈;박익모;신철재
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
    • /
    • v.12 no.6
    • /
    • pp.948-957
    • /
    • 2001
  • We proposed a novel feed structure for a broadband circular slot antenna. The proposed antenna has a circular slot, a radiating element, and a novel microstrip feed structure which is composed of a 50 Ω microstrip feedline and a circular-shaped microstrip patch. This antenna is analyzed and optimized by using the finite difference time domain (FDTD) method. The impedance bandwidth of optimized antenna is 1.94 octave that is much broader than the conventional microstrip slot antennas.

  • PDF

Miniaturized Bandpass Filter with Improved Stopband Characteristics using planar multilayer structure (평면의 적층구조를 이용한 저지대역 특성을 향상시킨 소형화된 대역통과 필터)

  • Choi, Oh-Seog;Nam, Hun;Lim, Yeong-Seog
    • Proceedings of the Korea Electromagnetic Engineering Society Conference
    • /
    • /
    • pp.278-282
    • /
    • 2003
  • The rapid growth of wireless and mobile communications has stimulated the development of multilayer filter technology. In this paper, one type of aperture-coupled microstrip interdigital-loop resonators in a multilayer structure are proposed and investigated for the applications to the design of a new class of compact microstrip bandpass filter. The new filter configuration consists of two arrays of microstrip interdigital-loop resonators that can be coupled through the apertures on the common ground plane. Depending on the arrangement of the apertures, different filtering characteristics can easily be realized. The results of measurement are almost similar to those of simulation.

  • PDF

Radiation Analysis of a Finite Microstrip Antenna Structure Using the CG-FFT Method : Volume Formulation (유한한 마이크로스트립 안테나구조에서 CG-FFT 방법을 이용한 복사 해석)

  • 손창우;이철훈김종규조영기
    • Proceedings of the IEEK Conference
    • /
    • /
    • pp.343-346
    • /
    • 1998
  • In this paper a radiation problem for a finite microstrip antenna structure is analyzed. For the analysis of finite structures we utilize the equivalent volume current. Intergral equation for the unknown equivalent volume current induced on a finite microstrip structure is derived and solved by the use of conjugate gradient-fast fourier. transform (CG-FFT) method. Some numerical examples are radiation patterns derived by the equivalent volume current solved by the conjugate gradient-fast fourier transform.

  • PDF

Characteristics of UHF Antenna with microstrip structure (UHF 대역용 마이크로 스트립 안테나 특성)

  • Park, Yong-Wook
    • Journal of the Korea Computer Industry Society
    • /
    • v.9 no.5
    • /
    • pp.217-222
    • /
    • 2008
  • The characteristics of UHF antenna with microstrip structure was studied. Design parameters as center frequency, band width, and VSWR by slot length, stub was analyzed by HFSS simulator. UHF antenna with microstrip structure was fabricated using FR4_epoxy substrate of 4.4 dielectric constant.

  • PDF

A Novel Design of Compact Low-Pass Filter and Its Equivalent Circuit Model

  • Li, Rui;Kim, Dong-Il;Choi, Chang-Mook;Song, Young-Man
    • Proceedings of the Korean Institute of Navigation and Port Research Conference
    • /
    • /
    • pp.79-84
    • /
    • 2006
  • A novel design of compact low-pass filter based on microstrip structure and its equivalent-circuit model are developed. The philosophy of the structure behind this novel microstrip low-pass filter is simple as it is composed of a pair of symmetrical parallel coupled-line and an open-stub. With this configuration, a finite attenuation pole near the stopband cutoff frequency is available and adjustable by simply tuning the circuit parameters. Furthermore, the rejection bandwidth of this type of low-pass filter can be extended. In order to validate the feasibility of the proposed design method, a low-pass filter based on a microstrip structure is designed, fabricated, and measured. Experimental results agree very well with the simulation and analytical results.

  • PDF

Simple RE Prediction Model of the Signal Line of the Microstrip Structure (마이크로스트립 구조의 신호선에 의한 방사성 간섭 예측모델)

  • Ju, Jeong-Ho;Jang, Geon-Ho;Kahng, Sung-Tek;Kim, Hyeong-Seok
    • 한국정보통신설비학회:학술대회논문집
    • /
    • /
    • pp.31-33
    • /
    • 2007
  • This work presents the simplified mechanism that the microstrip line generates the radiated emission which is one of the measures on the EMI levels. The electric currents on the metallization of the structure are input to the radiation integrals with the Green's functions being derived to consider the stratification of the microstrip. The simulated results suggest the method of the conceptualization on the RE characteristics of the signal trace in the PCB structure.

  • PDF