• Title/Summary/Keyword: Transmission Line Resonator

Search Result 86, Processing Time 0.02 seconds

Study on the effect of the characteristics of conductor and dielectric material on that of resonator (전극 및 유전체 특성이 공진기 특성에 미치는 영향 연구)

  • Yoo, Joshua;Lee, W.S.;Kim, J.W.
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
    • /
    • 2003.05c
    • /
    • pp.265-268
    • /
    • 2003
  • In RF application of resonator, cylinerical and transmission line(TRL) type are used generally, especially in ceramic modules the latter is used widely, TRL type resonators are used in VCO and RF filters etc.. TRL type resonators are divided stripline and microstripline and their characteristics depend on that of conductor and dielectric materials. In this study, the effect of material properties on the stripline resonator is measured and analyzed. Besides, the optimum design rule of resonator is presented.

  • PDF

The Dual-Mode Ring-Resonator Bandpass Filter Using Artificial-Transmission-Lines (인공전송선로를 이용한 이중모드 링-공진기 대역통과 여파기)

  • Sim, Kyung-sub;Hwang, Hee-yong
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
    • /
    • v.27 no.5
    • /
    • pp.424-429
    • /
    • 2016
  • This paper presents dual-mode ring-resonator bandpass filter using LUC of artificial-transmission-lines. The conventional ring-resonator bandpass filter has limitation in miniaturization because the conventional ring-resonator is based on a one wavelength operation, and problem due to undesire harmonics. The ring-resonator bandpass filter is miniaturized and show higher order mode rejection by configuring a ring-resonator with LUC of artificial-transmission-lines. The two-stage bandpass filter is designed and fabricated with a ring-resonator and input/output interdigital coupled line. A fabricated filter shows dual-mode, rejection of whole ultra wide band, sharp skirt characteristics and has ring area reduced by 60 % compared to the conventional ring-resonator bandpass filter.

Broadband VCO Using Electronically Controlled Metamaterial Transmission Line Based on Varactor-Loaded Split-Ring Resonator (Varactor-Loaded Split-Ring Resonator(VLSRR) 기반의 가변 Metamaterial 전송 선로를 이용한 광대역 전압 제어 발진기)

  • Choi, Jae-Won;Seo, Chul-Hun
    • Journal of the Institute of Electronics Engineers of Korea TC
    • /
    • v.44 no.11
    • /
    • pp.54-59
    • /
    • 2007
  • In this paper, broadband voltage-controlled oscillator (VCO) using electronically controlled metamaterial transmission line based on varactor-loaded split-ring resonator (VLSRR) is presented. First, it is demonstrated that VLSRR coupled to microstrip line can lead to metamaterial transmission line with tuning capability. The negative effective permeability is provided by the VLSRR in a narrow band above the resonant frequency, which can be bias controlled by virtue of the presence of varactor diodes. The VCO with 1.8 V power supply has phase noise of $-108.84\;{\sim}\;-106.84\;dBc/Hz$ @ 100 Hz in the tuning range, $5.47\;{\sim}\;5.84\;GHz$. The figure of merit (FOM) called power-frequency-tuning-normalized (PFTN) is 20.144 dB.

A Design of Improved Ring Resonator (개선된 링구조 공진기 설계 및 제작)

  • 홍상준;하성재;이영준;박병규;김창범;이근태;안창돈;홍의석
    • Proceedings of the Korea Electromagnetic Engineering Society Conference
    • /
    • 2002.11a
    • /
    • pp.136-140
    • /
    • 2002
  • In this paper, newly constructed 5.6 ㎓ ring resonator by using a T-Junction and a parallel transmission line. The resonator's size reduced twice more than a current ring and a hair-pin resonator at this paper's center frequency The loaded Q value is 240∼250 at center frequency. also, It was explained by RLC equivalent equation for the resonator.

  • PDF

Design of An Open-Ended Coaxial Cavity Resonator (한쪽 면이 열린 동축 공동 공진기의 설계에 대한 연구)

  • Lee, Yun-Min;Kim, Jin-Kook;Hur, Jung
    • The Journal of the Institute of Internet, Broadcasting and Communication
    • /
    • v.13 no.4
    • /
    • pp.201-208
    • /
    • 2013
  • This paper is a study of an empirical design of an open-ended coaxial cavity resonator. It can be done by using the radius of the inner conductor, the inner radius and the length of the resonator. However, the basic coaxial transmission -line theory can be seen that the characteristics of the resonant frequency and the Q value are varied by the change of length, regardless of the value of radius of the inner conductor and inner radius of the resonator. We find out the impact of radius of the inner conductor, inner radius of the resonator and the length of the resonator parameter and propose the optimized empirical resonator design method by reducing the error between the theoretical value and the design value. Based on the simulation, several resonators are fabricated by the size of 14 mm for the radius of inner conductor, 2 mm, 5 mm, 10 mm respectively for the inner radius of resonator, and 8.5 mm for the length of the resonator. The resonant frequencies of the produced resonators were measured at 6.1, 5.7, 6.5 GHz respectively. According to the result of simulation and measurement, we know that we can design the relatively exact open-ended coaxial cavity resonator by applying the basic coaxial transmission-line theory directly when the length of the resonator is less than 10 mm, and adding the correction factor of 0.5 GHz to the calculated resonant frequency in case of more than 10 mm of the length of the resonator.

New UWB BPF with Steep Selectivity Based on T-Resonator and Capacitively Coupled λ/4 and λ/2 Line Sections

  • Duong, Thai Hoa;Kim, Ihn-Seok
    • Journal of electromagnetic engineering and science
    • /
    • v.9 no.3
    • /
    • pp.164-173
    • /
    • 2009
  • In this paper, two new circuit structures for European and U.S. ultra-wide band(UWB) bandpass filters(BPFs) with sharp roll-off characteristics are introduced. We show first that the ultra-wide bandpass property is obtained from a $\lambda$/4 open T resonator with a capacitively coupled $\lambda$/4 short-circuited line, which provides two attenuation poles at lower and upper cutoff frequencies. Then, two identical capacitively coupled input/output lines, which can be $\lambda$/4-length open ends or $\lambda$/2-length short ends, with the T-resonator, are adopted to suppress lower and higher frequency components outside of the pass band. There is coupling between the input and output lines providing two additional transmission zeros in the lower and upper transition bands of the filter. Since the coupling between the T-resonator with the $\lambda$/4 short-circuited line and the input/output lines limits the bandwidth of the filter to the European UWB band, both the $\lambda$/4 short-circuited line and the input/output lines are inserted between the two stacked T-resonators for the U.S. UWB band. The filter structures are simulated with ADS and HFSS and realized with low-temperature co-fired ceramic(LTCC) green tape which has the dielectric constant of 7.8. Measurement results agree well with HFSS simulation results.

Wave Propagation Characteristics of Acoustic Metamaterials with Helmholtz Resonators (헬름홀츠 공명기들로 구성된 음향 메타물질의 파동전파 특성)

  • Kwon, Byung-Jin;Jo, Choonghee;Park, Kwang-Chun;Oh, Il-Kwon
    • Transactions of the Korean Society for Noise and Vibration Engineering
    • /
    • v.23 no.2
    • /
    • pp.167-175
    • /
    • 2013
  • The wave propagation characteristics of an acoustic metamaterial composed of periodically repeated one-dimensional Helmholtz resonator array was investigated considering the effects of dimensional changes of the resonator geometry on the transmission coefficient and band gap. The effective impedance and transmission coefficient of the acoustic metamaterials are obtained based on the acoustic transmission line method. The designed acoustic metamaterials exhibit band gaps and negative bulk modulus that are non-existent properties in the nature. The band gap of the acoustic metamaterial is strongly dependent on the geometry parameters of Helmholtz resonators and lattice spacing. Also, a new type of metamaterial that is periodically constructed with two different resonators was designed to open the local resonance band gap without change of Bragg scattering.

A Frequency Adjustable Double Lorentz CRLH Transmission Line using DGS (DGS를 이용한 주파수 가변 DL-CRLH 전송선로)

  • Lim, Jong-Sik;Lee, Jae-Hoon;Lee, Jun;Jeong, Yong-Chae;Han, Sang-Min;Ahn, Dal
    • The Transactions of The Korean Institute of Electrical Engineers
    • /
    • v.59 no.8
    • /
    • pp.1429-1435
    • /
    • 2010
  • In this paper, a double lorentz composite right left handed(DL-CRLH) transmission line is designed using defected ground structure (DGS) and varactor diodes. Previously, the diode has been adopted only selectively for one of parallel or series resonators, and the balanced frequency as well as triple band frequencies were fixed. However in the proposed DL-CRLH transmission line, the balanced frequency, where the resonant frequencies of the series-connected parallel resonator and shunt-connected series resonator are the same, is adjustable. In addition, the triple band frequencies are controlled, too. The measured balanced frequency varies between 3.42~4.8GHz according to the controlled bias voltage. Under the same bias condition for the balanced frequency, the adjusted frequencies are 2.22~2.77GHz, 3.7~5.2GHz, 7.32~8.23GHz, 3.42~4.8GHz, and 4.44~5.92GHz for the conditions that ${\beta}d=+0.5{\pi}$, $-0.5{\pi}$, 2nd $+0.5{\pi}$, ${\omega}_{\infty}$, and ${\omega}_o$, respectively.

Microstrip Bandpass Filter Using Stepped-Impedance Coupled-Line Hairpin Resonators with Enhanced Stopband Performance

  • Lee, Hye-Min;Ha, Jung-Hyun;Wang, Xu-Guang;Cho, Young-Ho;Yun, Sang-Won
    • Journal of electromagnetic engineering and science
    • /
    • v.11 no.2
    • /
    • pp.91-96
    • /
    • 2011
  • In this paper, we propose a microstrip bandpass filter using stepped-impedance coupled-line hairpin resonators. The stepped-impedance coupled-line hairpin resonator has extended harmonic suppression in comparison with a conventional hairpin resonator due to transmission zero and the movement of harmonic frequencies resulting from the stepped-impedance characteristic. A high-pass type impedance/admittance inverter is employed in order to improve the lower frequency skirt characteristics of the passband. A 4-pole bandpass filter is designed and fabricated at 1.8 GHz. The measured results show the excellent attenuation performance at the stopband which is greater than 30 dB up to 10 GHz.

광식각 기술을 이용한 미세라인의 형성 및 Series Resonator의 구현

  • 박성대;조현민;이영신;이우성;박종철
    • Proceedings of the International Microelectronics And Packaging Society Conference
    • /
    • 2001.07a
    • /
    • pp.151-156
    • /
    • 2001
  • Using the photoimageable thick film conductors, $25\mu\textrm{m}$ line widths and $25\mu\textrm{m}$ spaces can be obtained. Test patterns are made by green tape lamination, paste printing, exposing to UV light, developing in an aqueous process and cofiring. Postfiring method using alumina substrate can be also applied to fine line formation. Series gap resonator formed by photopatterning process showed the improved signal transmission characteristics compared to that obtained by conventional screen printing.

  • PDF