• Title, Summary, Keyword: ${\lambda}g/2$ Open stubs

Search Result 8, Processing Time 0.027 seconds

Design and Fabrication of a BPF for 5.8 GHz Microwave Wireless Power Transmission (5.8 GHz 마이크로파 무선전력전송을 위한 BPF의 설계 및 구현)

  • Lee, Seong Hun;Son, Myung Sik
    • Journal of the Semiconductor & Display Technology
    • /
    • v.14 no.4
    • /
    • pp.88-91
    • /
    • 2015
  • In this paper, we have designed and fabricated a BPF (Band Pass Filter) for 5.8GHz Microwave Wireless Power Transmission. We $used{\lambda}g/2$ open-circuited stubs in addition to T-shaped transmission lines for the BPF. This BPF removes harmonics caused by diodes of RF-DC converter, and thus the RF-DC converter converts more RF power to the DC. The performance of the BPF was measured and shown through direct comparison of voltages converted by the doubler as a RF-DC Converter with and without the BPF.

Design of a 5.8 GHz Narrow Band-pass Filter with Harmonics Suppression (고조파가 억제된 5.8 GHz 협대역 대역통과 여파기)

  • Yoon, Ki-Cheol;Lee, Jong-Chul
    • The Journal of Korean Institute of Communications and Information Sciences
    • /
    • v.33 no.2A
    • /
    • pp.167-173
    • /
    • 2008
  • In this paper, the flexible narrow bandpass filters (BPFs) with ${\lambda}$g/4 short and ${\lambda}$g/2 open stubs by microstrip line on duroid substrate are suggested. These BPFs 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 at microwave range. On the other hand, by replacing the series quarter-wavelength connecting lines with the equivalent T-shaped line of bandstop filter(BSF), the compact stub bandpass filter with harmonics suppression can be realized. The BPF with ${\lambda}$g/4 short stubs shows the insertion loss of 2.1 dB and the return loss of 18 dB and BPF with ${\lambda}$g/2 open stubs shows the insertion loss of 1.2 dB and the return loss of 21.9 dB at the center frequency of 5.8 GHz and the bandwidth of 10 %.

Design of a Broad Band-pass Filter with Stubs for Harmonics Suppression using the FSCS (FSCS를 이용한 고조파가 억제된 광대역 스터브 대역통과 여파기의 설계)

  • Choi, Young-Gu;Kim, Bok-Ki
    • Journal of the Institute of Electronics Engineers of Korea TC
    • /
    • v.45 no.1
    • /
    • pp.103-109
    • /
    • 2008
  • In this papaer, a new type of ${\lambda}_g/4$ short stub band pass filter and ${\lambda}_g/2$ open stub band pass filter are purposed. Both are designed using FSCS technique for harmonic suppression. The proposed filters that used FSCS technique and a broadband stop filter is integrated to band pass filter to suppress the harmonics. The BSF are also placed between stubs so that the size is larger than prevent as compared to conventional one. The propose filters have center frequency of 5.8 GHz, bandwidth of 50% and harmonics suppressin is 120% has in bandwith. The measurement results in the case of ${\lambda}_g/4$ short stub filter, insertion loss of 0.5 dB, return loss of 14 dB are achieved and in the case of ${\lambda}_g/2$ open stub filter, loss of 0.8 dB, return loss of 14.4 dB are achieved. The simulation results and the measurement results are almost the same.

Design and Fabrication of a Receiver Module for 5.8GHz Microwave Wireless Power Transmission (5.8GHz 마이크로파 무선전력전송을 위한 수신기 모듈 설계 및 구현)

  • Lee, Seong Hun;Son, Myung Sik
    • Journal of the Semiconductor & Display Technology
    • /
    • v.15 no.4
    • /
    • pp.16-21
    • /
    • 2016
  • In this paper, we have designed and fabricated a receiver module for 5.8GHz Microwave Wireless Power Transmission. The receiver module was composed of an antenna, BPF (Band Pass Filter) and RF-DC converter. The antenna was designed to RHCP (Right Hand Circular Polarization). And we used ${\lambda}g/2$ open-circuited stubs for the BPF. In addition, the RF-DC converter used the tripler voltage circuit for voltage multipliers. The integrated receiver RF module for 5.8GHz Microwave Wireless Power Transmission has been designed and fabricated. The voltage was measured to the distance of 50cm.

Novel Quasi-Elliptic Function Bandpass Filter Using Hexagonal Resonators with Capacitive Loading

  • Wang, Changtao;Li, Wenming;Liu, Feng;Liu, Haiwen
    • ETRI Journal
    • /
    • v.30 no.4
    • /
    • pp.615-617
    • /
    • 2008
  • A novel and compact elliptic-function bandpass filter is proposed in this letter. The techniques of slot etching and the addition of open stubs are applied to enhance the self-inductance and self-capacitance of hexagonal open-loop resonators. Thus, size reduction and improved transmission performance are obtained. Compared to the performance of the conventional design, the central frequency and insertion loss are reduced by 28% and 3.1 dB, respectively. Measurements show that the proposed filter has a fraction bandwidth of 23% at the central frequency of 1.84 GHz, and its insertion loss in the passband is less than -1.5 dB. The bandpass filter occupies only 12 mm${\times}$21.2 mm (approximately $0.24{\lambda}_g{\times}0.14{\lambda}_g$).

  • PDF

Design of a 5.8 GHz Broad Band-Pass Filter with Second of Harmonics Suppression Using the Open Stubs (2차 고조파가 억제된 5.8 GHz 광대역 개방형 스터브 대역 통과 여파기 설계)

  • Choi, Young-Gu;Kim, Bok-Ki
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
    • /
    • v.18 no.10
    • /
    • pp.1107-1116
    • /
    • 2007
  • In this paper, a broadband open stubs band pass filters which can suppress the second harmonics using Z-transform technique, is designed, fabricated and characterized. The proposed broadband filters integrate the band stop filter with the FSCS structure and ${\lambda}_g/4$ open stub in order to suppress the second harmonics. Due to insertion of BSF at input and output terminal, the size of the filter was increased in the conventional filter, however, in the proposed structure, the position of inverter that connects the stubs can be integrated between those stubs, thereby decreasing the size. So, it can be fabricated in the size of $18.7{\times}16.9mm^2$ which is smaller size than conventional one. The measured results of the proposed filters have center frequency of a 5.8 GHz with bandwidth of 95 %, insertion loss of 0.6 dB, return loss of 14 dB. The simulation results are consistent with measurement results. The filter is designed far X-band satellite communication and ITS applications.

Compact Open-stub Band-pass Filter with Narrow Bandwidth Using Impedance Mismatching of the Transmission- line (전송선로의 임피던스 부정합을 이용한 협대역 개방형 소형 스터브 대역통과 여파기)

  • Yoon, Ki-Cheol;Oh, Seung-Yeon;Oh, Kyoung-Min;Lee, Hyun-Wook;Hong, Tae-Ui;Lee, Jong-Chul
    • The Journal of The Korea Institute of Intelligent Transport Systems
    • /
    • v.7 no.6
    • /
    • pp.38-47
    • /
    • 2008
  • In this paper, the narrow band-pass filter with compact-size using the ${\lambda}g/2$ open stubs is proposed. The filter size is reduced by realization of transmission line at second harmonics and at the same time the power can be transferred to the output by using the fundamental wave generated in the resonator and the transmission line in which the impedance mismatch technique is adopted. Thus, the proposed filter can be reduced to half-length of horizontal transmission line than the conventional one. The experimental results show that insertion loss is 1.58 dB and return loss is 9.86 dB, and the fractional bandwidth is 10 % at the center frequency of 5.8 GHz. The filter size is $10.34{\times}18.56\;mm2$.

  • PDF

Design of Lowpass Filter With the Wide Stopband Characteristics Using Microstrip Line (마이크로스트립 선로를 이용한 광대역 차단특성을 가지는 저역통과 필터 설계)

  • Choi Dong-Muk;Shim Joon-Hwan;Jeon Joongn-Sung;Kim Dong-Il
    • Journal of Navigation and Port Research
    • /
    • v.30 no.5
    • /
    • pp.331-334
    • /
    • 2006
  • In this paper, we designed and fabricated the lowpass filter with the wide stopband characteristics using microp- strip line. Adding the $\lambda_g/4$ open stub at the input and output ports, we developed the L-C ladder type lowpass filter using the open stub which has wide stopband characteristics. In order to reduce the entire size qf this filter, the high impedance microstrip lines were made with the meander structure. The lowpass filter was fabricated with the cutoff frequency 2.3 GHz and its measured frequency responses agree well with the simulation results.