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this paper presents the implementation of a four-order distributed band-pass filter. The band-pass filter based on LTCC technology is composed of four good performance resonators, each resonator is composed of three layers parallel strip-line, transmission zeros caused by Z strip-line achieve good stop-band attenuation through cross-coupling. By ADS circuit simulation and the HFSS software to optimize...
A novel design of second-order dual-band H-plane band pass wave guide filter is presented in this paper. Filter design is relatively simple and is based on the use of complementary split ring resonators, implemented as metal septa, with properly shaped slots, in the transverse planes of the standard (WR-90) rectangular wave guide. The positions of the resonators on the same septum are chosen in such...
This paper presents the design of compact balanced-to-unbalanced (balun) bandpass filters (BPFs) using the low temperature co-fired ceramic (LTCC) technology. Three coupled half wavelength transmission-line are used to form the proposed circuit. The balun filter is designed to work at the center frequency of 5.5GHz with the fractional bandwidth of 9.8%. The size of the circuit is only 2.2mm*2.7mm*1...
A miniaturized bandpass filter with wide stopband is presented in this letter. It utilizes two spiral quarter-wavelength resonators for size reduction. By adding extra lines to the feeding structure, mismatching at harmonic frequencies can be realized and wide stopband can be obtained. To verify the proposed idea, an experimental filter is implemented. The measured results show that better than 25...
The paper presents a new concept of bandpass filters based on ½ wavelength resonators short-circuited and loaded at their middle by a series capacitor. The advantage of this type of resonator is the compactness and the possibility of achieving tunable filters. Simulation results for a hybrid technology (PCB-Surface Mount Components) to validate the concept show that miniaturization can reach a factor...
A compact quadruple-mode ring resonator is proposed for synthesis of a quasi-elliptic bandpass filter. The resonator is composed of four half-wavelength rings connected to a single grounded via. For miniaturization, the ring areas are overlapped and the crossovers are implemented by short CPW sections in the ground plane. As a result, the resonator uses about 50% area of a conventional dual-mode ring...
Design of miniaturized wideband filter in combline configuration using interresonator taps and interdigitally-coupled capacitive loading is described. The design is based on increasing the effective capacitance of the original quarter-wavelength combline resonator by engineering the loading interdigital capacitance at the open end of resonator, thus achieving the same resonant frequency by using a...
We propose a bandpass filter miniaturized by the composite right-handed and left-handed(CRLH) zeroth order resonators(ZORs). A 5th-order bandpass filter form a cascaded triplet(CT) to have a significantly sharp skirt for high frequency selectivity. First, we design an in-line ZOR bandpass filter whose total size is nearly 0.2 of the parallel-edge coupled filter. Second, we create multiple transmission...
A high performance, Ka-Band, dielectrically loaded dual mode cavity filter has been developed. It utilizes higher order HE12δ modes to achieve high Q factors, wide tuning range, and a large range of bandwidths. Similarity of the design with a more conventional HE11δ design results in high commonality of parts with Ku-band designs and thus lower cost.
This paper presents a novel dual-band bandpass filter (BPF) using half-mode substrate integrated waveguide (HMSIW) technology for the first time. The proposed filter is at least six times smaller than its conventional substrate integrated waveguide (SIW) counterpart with similar filter specifications. A three-pole dual-band Chebyshev BPF with center frequencies of 1.05 GHz and 1.3 GHz is designed...
System-on-Package (SOP) is presently the most effective method for realizing the miniaturization of wireless front-end applications. Band pass filter is one of the most important components in the SOP. In this paper, a 5-pole band pass cavity filter consisting of via walls was designed as a system-on-package solution for RF front-end modules at 34GHz, adopting low-temperature co-fired ceramics (LTCC)...
In this paper, we present an effective technique to miniaturize a substrate integrated waveguide (SIW) bandpass filter by using a double-sided complementary split ring resonator (DS-CSRR). With the proposed technique, the proposed DS-CSRR SIW filter provides a lower resonance frequency compared to a conventional complementary split ring resonator (CSRR) SIW filter thanks to the coupling effect between...
This paper presents design of a bandpass filter using a novel dual-mode miniaturized octagonal patch resonator. Two slots in orthogonal position are cut on the patch to reduce the resonance frequency. Two circular holes connected by a slot are used to perturb the two degenerate modes of the patch. The proposed filter is 64% smaller compared to an octagonal patch without any slots.
This paper summarizes recent researches on miniaturization of planar microwave passive components, in Computational Electromagnetics Laboratory at University of Electronic Science and Technology of China. Several filters and couplers are introduced, which can realize high performance with compact structures.
In this paper, a new concept for bandstop filters based on complementary split rectangle resonators etched into a single metal layer is proposed. Using equally length complementary resonators is the key behind the concept. This results an extreme improvement of the first spurious stopband with smooth insertion loss over a very wide bandwidth. The effect of adding slots in the proximity of the resonators...
A new type of dual mode patch resonator is proposed and dual-mode bandpass filters are designed by perturbing its degenerate modes using two slots which are orthogonal to each other. It has been shown that resonant frequencies of the degenerate modes can be varied independently by adjusting one slot length at a time. Geometrical size as well as radiation loss has been reduced further by using inductively...
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