A microstrip
bandpass filter is designed to have a fractional bandwidth of 2.94% (FBW = 0.0294) at a midband frequency [f.sub.0] = 2.0 GHz.
Kim, "Compact microstrip square open-loop
bandpass filter using open stubs" Electronics Letters, vol.
Zhu, "Highly selective differential-mode wideband
bandpass filter for UWB application," IEEE Microw.
Chen, "A novel wideband
bandpass filter using triple-mode slotline ring resonator," Progress In Electromagnetics Research Letters, Vol.
The design parameters of the
bandpass filter, i.e., the coupling coefficients and external quality factor can be determined in terms of low-pass prototype filter parameters ([g.sub.1], [g.sub.2], [J.sub.1] and [J.sub.2]) and the relationship between the bandpass design parameters and the low-pass parameters are determined using the formulas below [19].
Hong, "Ultra wideband
bandpass filter using embedded stepped impedance resonators on multilayer liquid crystal polymer substrate," IEEE Microwave and Wireless Components Letters, vol.
Chu, "Compact ultra-wideband (UWB)
bandpass filter using dual-stub-loaded resonator (DSLR)," IEEE Microw.
Yamashita, "
Bandpass filter using parallel coupled stripline stepped impedance resonators," IEEE Transactions on Microwave Theory and Techniques, vol.
Gao, "Compact quintuple-mode UWB
bandpass filter with good out-of-band rejection," Progress In Electromagnetics Research Letters, Vol.
In this paper, a compact UWB
bandpass filter using modified CRLH unit cells is implemented.
The
bandpass filter is one of the most important components in modern RF/microwave systems [1-3].
In [6] and [7], a continuously frequency and bandwidth tunable
bandpass filter using compact hairpin resonators and a combline structure was described.