Microstrip End-Coupled Filter Design at mm-Wave Frequencies

Abstract

This paper outlines a novel procedure for the design of end-coupled microstrip bandpass filters at near mm-wave frequencies. It presents results obtained for a fabricated 28.76GHz filter which yielded an insertion loss of 2.3dB in the passband and 30dB rejection at 4% below the centre frequency. The performance of this filter was superior to that of a conventional parallel-coupled filter designed for the same purpose.

Multi‐layer thick‐film microwave components and measurements

“…The coupling from one resonator to the other is through the gap between the two adjacent open ends. The design of single layer end‐coupled bandpass filters is well documented in the literature (Cunningham et al , 1989; Matthaei et al , 1990; Nguyen and Chang, 1985). The gaps are chosen to give the required capacitances.…”

Novel millimetre wave metawaveguide resonators and filters

“…In the resonator structures, which are viable to meet requirements of the modern technology [1], reduction of the physical size has become one of the primary goals. Recently proposed concepts of left-handed medium (LHM) have become the subject of extensive investigations due their capability to provide novel unconventional properties to different propagation media [2]- [4]. This approach makes use of the left-handed medium created by a novel type of resonance elements, Split Ring Resonators (SRRs), in combination with the thin metal wireline [4].…”

“…Recently proposed concepts of left-handed medium (LHM) have become the subject of extensive investigations due their capability to provide novel unconventional properties to different propagation media [2]- [4]. This approach makes use of the left-handed medium created by a novel type of resonance elements, Split Ring Resonators (SRRs), in combination with the thin metal wireline [4]. These are printed on the dielectric slab, which is then inserted into the plane of symmetry of the rectangular waveguide.…”