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Spurious modes suppression in Stacked Crystal Filter
2010 IEEE Long Island Systems, Applications and Technology Conference, 2010Stacked Crystal Filters (SCFs) are used in Bandpass filters and other applications where frequency control is required. SCFs use the Solidly Mounted Resonator (SMR) structure to enable operations at RF frequencies, typically 1–5 GHz. In the response spectrum of the SCFs, besides the main resonance mode, there are some unwanted additional modes present ...
Ambarish Roy +2 more
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4E-3 Spurious Mode Suppression in BAW Resonators
2006 IEEE Ultrasonics Symposium, 2006Designing bulk acoustic wave resonators for RF filter applications is governed by the need for a high quality factor (Q-value), a large piezoelectric coupling and the purity of the main resonance. The most powerful method to suppress spurious modes is terminating the edges of the resonators by a specific border region with a different eigenresonance ...
R. Thalhammer +3 more
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Dual‐mode microstrip bandpass filter with spurious response suppression
Microwave and Optical Technology Letters, 2007AbstractA dual‐mode bandpass filter (BPF) using microstrip patch resonator is proposed. Open‐stubs are added on the feed‐lines to suppress the spurious response and improve the stopband rejection effectively with little increase in circuit size. Furthermore, a reduced‐size dual‐mode BPF with spurious response suppression using microstrip slotted‐patch ...
Jian‐Xin Chen, Quan Xue
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Capacitive iris bandpass filters with spurious harmonic modes suppression
International Conference on Mathematical Methods in Electromagnetic Theory, 2003A new design of capacitively coupled bandpass filters, that provides suppression of spurious passbands for the dominant and second waveguide modes without any extension of the filter dimensions, keeping the same return loss within the passband, is presented.
A. Kirilenko, L. Mospan, V. Tkachenko
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Simulation Of Spurious Modes Suppression In Saw Resonator On Lnosic Substrate
2020 15th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA), 2021In this paper, the spurious modes in SAW resonator based on LNOSiC substrate are compared with those in conventional SAW resonator in COMSOL Multiphysics. By changing the electrode material, electrode thickness and Euler angle $\beta$ of Piezoelectric crystal of the resonator using LNOSiC substrate, the spurious modes can be suppressed after ...
Da-lin Huang, Yang Gao, Ting-ting Liu
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Spurious mode suppression via apodization for 1 GHz AlN Contour-Mode Resonators
2012 IEEE International Frequency Control Symposium Proceedings, 2012This paper reports, for the first time, on the application of apodization techniques to 1 GHz MEMS AlN Contour-Mode Resonators (CMRs [1]) to efficiently suppress spurious modes in close proximity of the main mechanical resonance. This concept has been applied with excellent results to a variety of one port resonators formed by patterned top electrodes ...
Marco Giovannini +3 more
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Miniaturized Dual-Mode Star-Shaped Bandpass Filter with Spurious Suppression
Electromagnetics, 2012Abstract A compact dual-mode resonator bandpass filter with harmonic suppression is presented. The filter is composed of a perturbed star-shaped resonator and defected ground structure units. The spurious suppression of the bandpass filter could be realized by controlling the dimension of the defected ground structure, which provides a low-pass ...
Tang Wei, Qian Kewei
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Miniaturized evanescent-mode cavity SIW bandpass filter with spurious suppression
2018 IEEE Radio and Wireless Symposium (RWS), 2018A compact evanescent-mode cavity SIW band-pass filter with a wide stopband is presented. To achieve a smaller profile, resonators are required to be highly loaded. However, the spurious responses become closer to the main passband when the loading is accomplished radially.
Shahrokh Saeedi, Hjalti H. Sigmarsson
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Suppression of spurious modes in high power travelling wave tubes
1982 International Electron Devices Meeting, 1982The main task of this work was to establish suitable means to suppress band edge oscillations in broad band coupled-cavity TWT's. The electric field flux lines in the slow wave structure have been calculated by means of conformal mapping. In the operating range, only transversal waves are existent, whereas at the upper cut-off frequency also E-modes ...
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Advanced lateral structures of BAW resonator for spurious mode suppression
2012 42nd European Microwave Conference, 2012To suppress spurious mode of the BAW (Bulk Acoustic Wave) resonator, advanced lateral structures are proposed. Three different techniques of apodization, air-edge reflector and border frame are integrated. Firstly, apodization is the method to design a proper shape of resonator which avoids parallel edges.
Hosoo Park +7 more
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