DocumentCode :
51433
Title :
Tunable 3-D Bandpass Frequency-Selective Structure With Wide Tuning Range
Author :
Huang, X.G. ; Shen, Z. ; Feng, Q.Y. ; Li, B.
Author_Institution :
Sch. of Inf. Sci. & Technol., Southwest Jiaotong Univ., Chengdu, China
Volume :
63
Issue :
7
fYear :
2015
fDate :
Jul-15
Firstpage :
3297
Lastpage :
3301
Abstract :
A new three-dimensional (3-D) tunable bandpass frequency selective structure (FSS) with wide tuning range is presented. The tunable FSS consists of a periodic array of printed circuit boards and a number of inserted metallic plates, where varactor-loaded λ/4 stepped-impedance resonators (SIRs) are constructed based on the propagation mode excited in the structure. By properly choosing the impedance ratio of the SIRs, a wide tuning range can be achieved. Detailed discussion is given to determine the key parameters involved in this tunable FSS, including varactor-loaded λ/4 resonators and coupling coefficient. Finally, a prototype tunable FSS is fabricated and measured. The results exhibit a 2:1 (65%) frequency tuning range from 1.4 to 2.75 GHz with an insertion loss of 4.5-1.0 dB within the passband.
Keywords :
UHF filters; UHF resonators; band-pass filters; frequency selective surfaces; resonator filters; varactors; SIR impedance ratio; coupling coefficient; frequency 1.4 GHz to 2.75 GHz; loss 4.5 dB to 1.0 dB; metallic plates; printed circuit board periodic array; propagation mode; three-dimensional tunable bandpass frequency selective structure; tunable 3D bandpass frequency-selective structure; tunable FSS; varactor-loaded λ/4 stepped-impedance resonators; wide tuning range; Capacitance; Frequency selective surfaces; Microstrip; Resonant frequency; Surface impedance; Tuning; Varactors; Stepped-impedance resonator (SIR); Tunable frequency selective structure (FSS); stepped-impedance resonator; tunable frequency-selective structure (FSS); varactor diode;
fLanguage :
English
Journal_Title :
Antennas and Propagation, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-926X
Type :
jour
DOI :
10.1109/TAP.2015.2428737
Filename :
7100872
Link To Document :
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