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Three-Pole Tunable Bandpass Filters With Constant Fractional Bandwidth Using Mixed Comb-line Resonators
-
Zhiyuan Zhao
,
Jiang Chen
Published/Copyright:
August 19, 2014
Abstract
A novel three-pole tunable bandpass filter using mixed combline resonators with a center frequency band of 0.9–1.8 GHz is proposed in this paper. The varactor-tuned filter is designed on a Rogers substrate with εr = 2.2 and h = 1 mm, with 1-dB fractional bandwidth of 11% ± 0.6% (absolute bandwidth 97 MHz to 187.2 MHz). Its insertion loss is varying from 4.58 dB to 2.86 dB and return loss is better than 10 dB within the tuning frequency range. The measured third-order inter-modulation intercept point and 1-dB power compression point at midband (1.35 GHz) are higher than 17 and 8 dBm, respectively. The measured results show good agreement with the simulated ones.
Keywords: three-pole tunable filters; constant fractional bandwidth; mixed combline resonators; varactor-tuned;
PACS: 84.40.Dc
Received: 2013-12-22
Published Online: 2014-8-19
Published in Print: 2014-9-30
©2014 by Walter de Gruyter Berlin/Boston
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Keywords for this article
three-pole tunable filters;
constant fractional bandwidth;
mixed combline resonators;
varactor-tuned
Articles in the same Issue
- Frontmatter
- Laudatio Prof. Groll zum 90. Geburtstag
- Nachruf Prof. Dr.-Ing. Heinz Chaloupka
- Reference Plane Transformation of Continuous Mode Terminations for Broadband Power Amplifiers
- Potential of Coplanar X-band GaN-MMIC Power Amplifiers
- High Directivity Microstrip Coupler with Asymmetric Structure
- Three-Pole Tunable Bandpass Filters With Constant Fractional Bandwidth Using Mixed Comb-line Resonators
- UWB Band-notched Adjustable Antenna Using Concentric Split-ring Slots Structure
- Evaluation of Cathode Heater Assembly for 42 GHz, 200 kW Gyrotron
- Optical Solitons in Magneto-optic Waveguides with Spatio-temporal Dispersion
- Outage Analysis of Dual-hop Cognitive Networks with Relay Selection over Nakagami-m Fading Environment
- A Novel Nonlinear Companding Transform for PAPR Reduction in Lattice-OFDM System
- On the First and the Second Order Statistics of the Capacity of κ-μ Fading Channels
- On the Performance of the Golden Code in the Presence of Channel Estimation Error in Correlated MIMO Rayleigh Fading Channels
- Evaluations of SSC Diversity Receiver over EGK Fading Channels
- New Tone Reservation Technique for Peak to Average Power Ratio Reduction
