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A silicon based THz substrate integrated waveguide (SIW) bandpass filter with a pair of antipodal linearly tapered slot Antennas (ALTSA) is designed and fabricated with MEMS process. A prototype with passband range 350GHz~370GHz is measured by using a quasi-optic measurement system. The measured data are in agreement with the simulated results, which show the filter has good selection performance...
This paper presents a simple structure for suppressing the second-harmonic of tunable filters. The proposed resonator for the filter possesses the advantage that its resonant frequencies of odd-mode can be electrically tuned, whereas the even-mode harmonics can be suppressed. In addition, it is very simple and compact in structure. Based on the proposed resonator, a tunable filter with harmonic suppression...
The system complexity, detection probability and average acquisition time are the most important performances. This paper proposes a novel method to reduce false-alarm probability and improve these performances, which utilizes the changes of power spectral density between in-sync and out-of-sync, and uses the difference of signals in-band and out-of-band instead of the signals in-band as the inputs...
In this paper, a dual-band bandpass filter (BPF) and a diplexer based on double-sided parallel-strip line (DSPSL) with an inserted conductor plane are proposed. The novelty of the proposed structure lies in the use of the isolation feature of the inserted conductor plane to provide two transmission paths for the RF signals; meanwhile no extra combination circuits for the two paths are required. The...
This article uses the advanced wavelet theory to perform multi-criteria transformation on the medical CT image wavelet in order to obtain directive components. The improved wavelet threshold value law is combined with the wavelet homomorphism filter corresponding to the obtained directive components to remove noise and enhance image effect, finally resulting in the multi-scale (level) enhanced images...
In this paper, a novel integrated bandpass filter balun based on the double-sided parallel-strip line (DSPSL) with an inserted conductor plane is proposed. The conductor plane, inserted into the middle of the substrate, can function as virtual ground plane to convert the top and bottom identical resonators into two back-to-back microstrip resonators. The out-of-phase feature between the two output...
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