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A compact folded interdigital bandpass filter using low temperature co-fired ceramic (LTCC) technology is proposed. Strong capacitive couplings between the double-layer coupled stripline resonator structure are introduced to realize miniature bandpass filters. A design of an eight-pole Chebyshev folded filter with such structure is performed in this paper. The simulation response exhibits an insertion...
A novel millimeter-wave LTCC based on three-line stripline structure wideband bandpass filter is presented. Folded structures are employed to realize minimization. Compared with traditional three-line structure, the presented structure can easily expand the passband with using much more compact 3-D structure, and introduce one transmission zero by putting resonators in a folded way, so that the rejection...
In this paper, a new kind of dual-mode Folded Substrate Integrated Waveguide (FSIW) filters in K-band with Low-Temperature Co-fired Ceramics (LTCC) technology is proposed. Dual-mode FSIW filter of single resonant cavity is designed to degenerate two modes: folded TE201 and TE102, which results in two transmission zeros on each side of the pass-band. To further validate its characteristics, a dual-mode...
In this paper, two types of partial H-plane bandpass filter are proposed, which are implemented by substrate integrated folded waveguide (SIFW). These filters have advantages of compact, easy for integration, low cost, and mass-producible properties. The presented partial H-plane bandpass filter with H-plane septa has the similar frequency responses as those of traditional E-plane waveguide filter...
Two compact microwave band pass filters used in Ka band LTCC frequency synthesizer are presented in this paper. The filters are buried in the Ferro-A6 substrate. Modified SIR structure is employed to improve the stop band rejection and minimize the size of the LTCC BPF. The design processes are proposed. The measured results of the BPFs agree well with the simulation.
An improved SIFW structure is proposed for the first time in this paper. Base on the new structure, two novel millimeter-wave SIFW BPFs have been analyzed and designed in this paper. Through the cross-coupling, the filters could provide TZs on lower and higher stopband which greatly enhance the side-band rejection. LTCC technology is also implemented to realize further compact size of this filter...
In this work, we propose a novel millimeter-wave SIW bandpass filter (BPF) that combines the technology of E-plane iris filter, SIW and LTCC. This filter with equivalent E-plane iris mounted in SIW is buried in LTCC substrates, and has a pass bandwidth from 34.1GHz to 35.9GHz. The insertion loss is less than 1.8dB and the return loss is better than 21dB in the entire pass band.
In this paper, a design of narrowband cavity LTCC bandpass filter was presented, including basic synthesis, structure configuration and EM-simulation. According to full-wave EM simulation, insertion loss was less than 0.9 dB in the passband (34.5 GHz - 35.5 GHz) . At last, topology of the embedded LTCC BPF was in harmony with the whole LTCC transceiver module and can be realized very easily by LTCC...
This paper deals with an embedded multilayer LTCC interdigital bandpass filter. This compact filter is used in LTCC transceiver module to suppress the unnecessary frequency components in LO branch. According to validation, measured results are in good agreement with simulated results. The passband insertion loss and stopband suppression at concerned frequency points accomplishes suppression desires...
A compact high-selective stripeline SIR bandpass filter based on LTCC technology has been proposed in this study. Through the cross-coupling, the filter could provide a single pair of transmission zeros (TZs) near the passband, which greatly enhance the side-band rejection. Due to the optimization of impedance rate of the SIR, we could not only reduce the filter size, but also control the spurious-mode...
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