TY  - JOUR
AV  - none
N1  - cited By 5
TI  - A New Class of Dual-Band Waveguide Filters Based on Chebyshev Polynomials of the Second Kind
SP  - 28571
SN  - 21693536
PB  - Institute of Electrical and Electronics Engineers Inc.
EP  - 28583
N2  - This paper presents for the first time a method of mathematical synthesis involving chaining of Chebyshev polynomials of the second kind for the application of a dual-band waveguide filter. This method takes advantage of second kind Chebyshev polynomials that have high out-of-band rejection, and overcomes unequal-ripple properties. It is applicable to high filter orders greater than five, and will always possess symmetrical dual-band filter properties. This proposed approach is able to achieve an optimum and constant ripple, the flexibility of return loss, and high adjacent band's rejection. The design method is based on suitably defined transmission zeros at the centred frequency to the chained Chebyshev of the second kind. A sixth-order waveguide filter based on a prescribed return loss of 15 dB centred at a frequency of 28 GHz, with a fractional bandwidth of 1 in each passband, has been implemented and fabricated. The measured results show that the return loss, total bandwidth, and the frequency shift are 12 dB, 860 MHz, and 0.24, respectively. The measured and ideal responses of the waveguide model are in a good agreement. © 2013 IEEE.
KW  - Bandpass filters; Bandwidth; Chebyshev filters; Circular waveguides; Microstrip devices; Microwave filters; Polynomials; Transmissions; Waveguides
KW  -  Chebyshev; Chebyshev polynomials; Chebyshev polynomials of the second kind; Fractional bandwidths; Narrow bands; Out of band rejection; Transmission zeros; Waveguide models
KW  -  Waveguide filters
ID  - scholars13962
Y1  - 2020///
UR  - https://www.scopus.com/inward/record.uri?eid=2-s2.0-85079745758&doi=10.1109%2fACCESS.2020.2972160&partnerID=40&md5=fbc8089e1d2fb88bc7b544413cdaf233
A1  - Leong, Y.
A1  - Cheab, S.
A1  - Soeung, S.
A1  - Wong, P.W.
JF  - IEEE Access
VL  - 8
ER  -