Microstrip Interdigital Hairpin Resonator With an Optimal Physical Length

Abstract

In this letter, we report a novel microstrip interdigital hairpin resonator by having the parallel coupled lines in a conventional miniaturized hairpin resonator replaced by an interdigital capacitor. Equations are derived in order to design the resonator with an optimal physical length. It will be proved that the novel resonator can achieve even more size reduction than the conventional miniaturized hairpin resonator owing to the employment of the slow-wave structure. Finally, a four-pole cross-coupled bandpass filter using the optimal resonator is fabricated as verification.Index Terms-Bandpass filter (BPF), interdigital capacitor, microstrip, miniaturized hairpin resonator.

Design of Band-Pass Filters Using Stepped Impedance Resonators With Floating Conductors

“…being the effective permittivity of the transmission line used to implement the open-loop resonator (note that if P s =1 we recover the results in [29] and if P s = P o =1 we are in the case treated in [30]). In brief, we conclude that, for miniaturization purposes, the SIR must be designed so as to get values of R zo , P s and P o as small as possible whereas θ 0 s and θ 0 o fulfill the minimum conditions in (3) and (4).…”

Miniaturisation of a 2-Bits Reflection Phase Shifter for Phased Array Antenna based on Experimental Realisation

“…The loaded line section (stage 1 of Figure 9 (a)) is equivalent to a transmission line characterised by a low propagation velocity (stage2 of Figure 9 (a)). This method can offer a size reduction lower than 50% [15][16]. www.ijacsa.thesai.org Based on this method, we can replace the delay lines characterised by electric length equal to θ0=45° by a sections of loaded line with capacitor.…”

“…The 180° and 90° MMIC PS have demonstrated a phase of 187±7° over 0. [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] GHz and a phase of 93°±7° over 7-12 GHz.…”

Design of Compact Microstrip U Shape Bandpass Filter Using Via Ground Holes

“…The design filter using microstrip line is used by many researchers [2][3][4][5][6][7][8][9][10][11][12][13]. One of method is U-shape resonator or it is called hairpin resonator.…”