• Title/Summary/Keyword: stub BPF

Search Result 19, Processing Time 0.028 seconds

Compact UWB Band-pass Filter with Open-Stub Using Impedance Mismatching and SIR (임피던스 부정합 및 SIR을 적용한 개방형 광대역 소형 스터브 대역통과 여파기)

  • Lee, Won-Seok;Yoon, Ki-Cheol
    • Journal of the Institute of Electronics and Information Engineers
    • /
    • v.51 no.6
    • /
    • pp.282-289
    • /
    • 2014
  • In this paper, the UWB (Ultra Wide Band) band-pass filter (BPF) with compact-size using impedance mismatching in transmission line and SIR (Stepped Impedance Resonator) instead of open stubs is presented. The proposed BPF have 103 % of bandwidth and 11.2 GHz of center frequency, respectively. In additional, the operation frequencies of the suggested BPF are 4.8 GHz to 16 GHz. In this structure, the length of the transmission line is reduced to half compared with the original one by impedance mismatching technique with low frequency band (sub harmonics) and harmonic components. Also, the open stub can be used for SIR due to reduced size. Experimental results show that the insertion and return losses are 0.35 dB and 15.1 dB, respectively and the filter size is $8.92{\times}10.6mm^2$. The proposed BPF is in good agreement.

Design of a Dual-Band Bandpass Filter Using an Open-Loop Resonator

  • Im, Hyun-Seo;Yun, Sang-Won
    • Journal of electromagnetic engineering and science
    • /
    • v.17 no.4
    • /
    • pp.197-201
    • /
    • 2017
  • In this paper, we present a novel design for a dual-band bandpass filter (BPF) based on the conventional second-order, open-loop BPF. By adding series resonant circuits to the open ends of the resonator, we can create two resonant modes from the even and odd modes. One pair of the even and odd modes constitutes the upper passband, while the other pair constitutes the lower passband. By adding another series resonant circuit to the open-loop resonator, we can control the bandwidth of either the upper passband or the lower passband. We can replace the series resonant circuits with simple microstrip line resonators. A dual-band BPF working at both Wi-Fi bands (2.4 GHz and 5.8 GHz bands) is designed based on the proposed method and is tested. The measured and simulated results show excellent agreement.

Miniaturized Narrow Band-pass Filter with λg/4 Short Stubs Using S-Shaped Folded Coupling Structure (크기가 축소된 S 형태의 Folded 커플링 구조를 이용한 λg/4 단락형 협대역 스터브 대역통과 여파기)

  • Yoon, Ki-cheol;Kim, Seong-cheol
    • Journal of the Korea Institute of Information and Communication Engineering
    • /
    • v.19 no.10
    • /
    • pp.2269-2274
    • /
    • 2015
  • In this paper, the reduced size in horizontal sizes of the narrow band pass filter (BPF) with λg/4 short stub using S shaped folded coupling structure is presented. This BPF with narrow bandwidth show flexible bandwidth with variation of the position of the stubs using the Qe(external quality factor) without changing the impedance value. On the other hand, by replacing the horizontal quarter-wavelength transmission lines with the equivalent S shaped coupled line, the BPF with reduced the size of horizontal can be realized. The proposed BPF shows the insertion loss of 1.46 dB and the return loss of 16.5 dB with bandwidth of 3.4 % at the center frequency of 5.8 GHz, respectively.

A Tuable Dual-Band Bandpass Filter Design Using Variable Characteristic Transmission Lines (가변 특성 임피던스 전송 선로를 이용한 가변 이중 대역 대역 통과 여파기)

  • Chaudhary, Girdhari;Jeong, Yong-Chae;Lim, Jong-Sik;Kim, Dong-Su;Kim, Jun-Chul
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
    • /
    • v.22 no.9
    • /
    • pp.852-857
    • /
    • 2011
  • In this paper, the application of a variable characteristic impedance transmission line that can be used to design a dual-band bandpass filter(BPF) is presented. The proposed filter offers a fixed first frequency passband and a controllable second passband. The tuning of the second passband is achieved by varying the characteristic impedance of and open shunt stub line in a stub loaded resonator(SLR) with the help of a defected ground structure(DGS) transmission line and varactor diodes. In order to validate the proposed structure, a two stage dual-band BPF with three transmission zeros was implemeted and experimentally verified based on its theoretical predictions and simulations.

Design for Frequency Tripler Using Novel Bandpass Filter with Low Insertion Loss (낮은 삽입손실을 갖는 새로운 대역통과 필터를 이용한 주파수 3체배기 설계)

  • Min, Jun-Ki;Cho, Seung-Yong;Kim, Hyun-Jin;Kim, Yong-Hwan;Lee, Kyoung-Hak;Kim, Dae-Hee;Yun, Ho-Seok;Hong, Ui-Seok
    • The Journal of Korean Institute of Communications and Information Sciences
    • /
    • v.31 no.10A
    • /
    • pp.1031-1036
    • /
    • 2006
  • This paper proposes a novel BPF structure with less insertion loss and small size instead of the existing coupled line BPF for the output of the tripler using APDP (Anti-Parallel Diode Pair). This proposed BPF consists of the interdigital capacitor and spiral open stub. The proposed BPF has the insertion loss of less than 0.7dB within the band $(16.41{\sim}19.23GHz)$. The conversion loss of the tripler is about $16.6{\sim}18.5dB$ $(flatness<{\pm}1dB)$ at $5.72{\sim}6.28GHz$ of fundamental frequency. Its fundamental frequency and the fifth harmonic suppression characteristic at 6GHz are -32.16dBc and -44.6dBc, respectively And its phase noise attenuation characteristic is about 9.5dB at 100kHz.

Quad-Band Bandpass Filter Using Quad-Mode Stub-loaded Resonators

  • Liu, Haiwen;Wang, Xiaomei;Wang, Yan;Li, Shen;Zhao, Yulong;Guan, Xuehui
    • ETRI Journal
    • /
    • v.36 no.4
    • /
    • pp.690-693
    • /
    • 2014
  • Compact multi-band bandpass filters using quad-mode stub-loaded resonators are proposed in this letter. Firstly, a novel approach about the mode-splitting characteristics of the quadruple-mode resonator is investigated, which can provide dual-band behavior. Secondly, a quad-band filter is proposed and designed by cascading two quadruple-mode resonators; the upper one operates at 1.8/2.4 GHz (GSM- and WiMax-band) and the lower one at 1.57/2.1 GHz (GPS- and WCDMA-band). Finally, the proposed filters have been fabricated. Respectable agreement between simulation and measurement verifies the validity of this design methodology.

A Novel Dual-Mode Bandpass Filter Based on a Defected Waveguide Resonator

  • Guan, Xuehui;Fu, Wei;Liu, Haiwen;Ahn, Dal;Lim, Jong-Sik
    • ETRI Journal
    • /
    • v.33 no.6
    • /
    • pp.953-956
    • /
    • 2011
  • A novel dual-mode bandpass filter (BPF) using a dual spiral-shaped defected ground waveguide (DGW) resonator is proposed in this letter. The dual-mode characteristic of this filter is achieved by loading a defected T-shaped stub at the midline of the spiral-shaped DGW resonator. Also, non-orthogonal input and output feed-lines are adopted in the filter. Based on the compact DGW structure, a dual-mode BPF with central frequency of 1.5 GHz for the global positioning system is designed, fabricated, and measured. Measured results agree well with the predicted response and verify the proposed methodology.

A Study on Design of Band Pass Filter using Ring Resonators (링 공진기를 사용한 대역통과 필터의 설계에 관한 연구)

  • Kim, Dong-Il;Kim, Bo-Young;Rui, Li
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
    • /
    • v.15 no.6
    • /
    • pp.533-539
    • /
    • 2004
  • In this work, in order to realize a band pass filter with wide-band characteristics for mobile communications, 2 GHz band pass filter was designed using ring resonator with stub. The three stage wide-band BPF was designed and fabricated. For broadband design, the ring circumference was divided by 4 sections with 1/8 wavelength and 2 sections with 1/4 wavelength which have different line impedances. The characteristics of the proposed BPF were highly improved by using three stage ring resonator. The characteristic impedance values of each sections were obtained by Powell's least square algorithm where differentiations are not needed. The measured results showed a good agreement with the theoretical results as well as ADS simulation.

Compact Dual-Wideband Bandpass Filter with Multimode Resonator

  • Liu, Haiwen;Li, Shen;Guan, Xuehui;Ren, Baoping;Lei, Jiuhuai;Wang, Yan
    • ETRI Journal
    • /
    • v.36 no.1
    • /
    • pp.163-166
    • /
    • 2014
  • A microstrip dual-wideband bandpass filter using a multimode resonator (MMR) is proposed in this letter. The proposed MMR loaded with a T-shaped open-ended stub and a short-ended stub exhibits triple mode characteristics, and a synthesis method is developed to illustrate the wide passband with independently controllable center frequencies and bandwidths. To verify this design methodology, a dual-wideband filter with fractional bandwidths of 19.1% and 27.9% is designed and fabricated. The measured results agree with the simulations.

A Broad-band Rectenna Using Stub Filter (스터브 필터를 이용한 광대역 렉테나 설계)

  • Oh, Kyoung-Min;Lee, Hyun-Wook;Nam, Hee;Yoon, Ki-Cheol;Hong, Tae-Ui;Lee, Dae-Sung;Hwang, Hak-In;Lee, Jong-Chul
    • The Journal of The Korea Institute of Intelligent Transport Systems
    • /
    • v.7 no.4
    • /
    • pp.86-96
    • /
    • 2008
  • In this paper, a new broadband rectenna is presented for the wireless transmission of microwave power. The new broadband rectenna element is based on a new printed monopole broadband antenna with size reduction using surface current distribution and a new broadband stub bandpass filter with suppression of second harmonics. A RF-to-DC conversion efficiency of 80% using a 270 ohm load resistor is obtain at 2.45 GHz. Also, a conversion efficiency of above 50 % is maintained from 1.8 GHz to 2.8 GHz.

  • PDF