Open Access
High- RF-MEMS 4-6-GHz Tunable Evanescent-Mode Cavity Filter
Reads0
Chats0
TLDR
In this paper, a two-pole filter with an internal volume of 1.5 cm and an insertion loss of 4.91-3.18- and a 1-dB bandwidth of 17.8-41.1 MHz, respectively, is presented.Abstract:
This paper presents a miniature high- tunable evanescent-mode cavity filter using planar capacitive RF micro- electromechanical system (MEMS) switch networks and with a frequency coverage of 4.07-5.58 GHz. The two-pole filter, with an internal volume of 1.5 cm , results in an insertion loss of 4.91-3.18- and a 1-dB bandwidth of 17.8-41.1 MHz, respectively, and an ulti- mate rejection of 80 dB. RF-MEMS switches with digital/analog tuning capabilities were used in the tunable networks so as to align the two poles together and result in a near-ideal frequency response. The measured of the filter is 300-500 over the tuning range, which is the best reported using RF-MEMS technology. The filter can withstand an acceleration of 55-110 g without affecting its frequency response. The topology can be extended to a multiple-pole design with the use of several RF-MEMS tuning networks inside the evanescent-mode cavity. To our knowledge, these results represent the state-of-the-art in RF-MEMS tunable filters.read more
Citations
More filters
Journal ArticleDOI
Tuning in to RF MEMS
Gabriel M. Rebeiz,Kamran Entesari,I. Reines,Sang-June Park,Mohamed El-Tanani,A. Grichener,April S. Brown +6 more
TL;DR: RF MEMS technology was initially developed as a replacement for GaAs HEMT switches and p-i-n diodes for low-loss switching networks and X-band to mm-wave phase shifters, but it has been found that its very low loss properties, its simple microwave circuit model and zero power consumption, and its high power handling capabilities make it the ideal tuning device for reconfigurable filters, antennas and impedance matching networks.
Journal ArticleDOI
Comb-based radiofrequency photonic filters with rapid tunability and high selectivity
V. R. Supradeepa,V. R. Supradeepa,Christopher M. Long,Christopher M. Long,Rui Wu,Fahmida Ferdous,Ehsan Hamidi,Ehsan Hamidi,Daniel E. Leaird,Andrew M. Weiner +9 more
TL;DR: Using electro-optically generated frequency combs, the authors demonstrate radiofrequency photonic filters that can potentially provide simultaneous high stopband attenuation, fast tunability and bandwidth reconfiguration.
Journal ArticleDOI
A 1.2–1.6-GHz Substrate-Integrated-Waveguide RF MEMS Tunable Filter
TL;DR: In this article, a two-pole filter implemented on RT/Duroid 6010LM exhibits an insertion loss of 2.2-4.1 dB and a return loss better than 15 dB for all tuning states.
Journal ArticleDOI
High- $Q$ Narrowband Tunable Combline Bandpass Filters Using MEMS Capacitor Banks and Piezomotors
TL;DR: In this article, a new class of evanescent tunable combline bandpass filters based on electronic tuning with the use of RF microelectromechanical systems (RF-MEMS) capacitor banks and also mechanical tuning using piezomotors is presented.
Journal ArticleDOI
Co-Design of Highly Efficient Power Amplifier and High- $Q$ Output Bandpass Filter
TL;DR: In this paper, a co-design configuration of a power amplifier in cascade with a high-Q bandpass filter is reported, which leads to smaller size/volume, minimized loss, and enhanced overall performance.
References
More filters
Journal ArticleDOI
Q-Factor Measurement with Network Analyzer
Darko Kajfez,E.J. Hwan +1 more
TL;DR: Ginzton's impedance method of Q-factor measurement is adapted to network analyzer techniques as mentioned in this paper, where the circuit model of the resonator incorporates also an external reactance which varies linearly with frequency to take into account the effects of the coupling mechanism and the influence of distant resonant modes.
Journal ArticleDOI
The Design of Evanescent Mode Waveguide Bandpass Filters for a Prescribed Insertion Loss Characteristic
G.F. Craven,C.K. Mok +1 more
TL;DR: In this paper, a design theory for evanescent dominant mode waveguide filters is presented, where the cutoff guide is represented by its equivalent /spl pi/section network, the elements of which closely approximate lumped inductances.
Journal ArticleDOI
Low-Loss Two-Pole Tunable Filters With Three Different Predefined Bandwidth Characteristics
Sang-June Park,Gabriel M. Rebeiz +1 more
TL;DR: In this paper, a planar tunable filter with three different fractional-bandwidth variations was designed and fabricated on epsivr = 2.2, 0.787 mm Duroid substrates for 850-1400 MHz applications.