Journal ArticleDOI
Miniaturized UWB Filters Integrated With Tunable Notch Filters Using a Silicon-Based Integrated Passive Device Technology
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TLDR
In this article, a miniaturized ultra-wideband bandpass filter integrated with tunable notch filters using a silicon-based integrated passive device technology is implemented on a micromachined silicon substrate, showing an insertion loss of 11 dB, return loss of better than 15 dB, and attenuation of more than 30 dB at both lower and upper stop-bands.Abstract:
This paper reports on the implementation of miniaturized ultra-wideband filters integrated with tunable notch filters using a silicon-based integrated passive device technology An ultra-wideband bandpass filter is realized on a micromachined silicon substrate, showing an insertion loss of 11 dB, return loss of better than 15 dB, and attenuation of more than 30 dB at both lower and upper stop-bands, with a spurious-free response up to 40 GHz The filter occupies only 29 mm 24 mm of die area To address the in-band interference issues associated with ultra-wideband communication, very compact tunable notch filters are monolithically integrated with the bandpass filters A two-pole tunable notch filter integrated with an ultra-wideband filter provides more than 20 dB rejection in the 5-6 GHz range to reject U-NII interferences, with a total footprint of 48 mm 29 mm The power handling, linearity, and temperature stability of filters are characterized and presented in this paperread more
Citations
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Journal ArticleDOI
Reconfigurable Multi-Band Microwave Filters
Abstract: An original and simple approach to the design of fully reconfigurable multi-band microwave bandpass filters (BPFs) with an arbitrary number of passbands is reported in this paper. It exploits the use of an innovative quasi-BPF configuration made up of different sets of controllable mono-frequency resonators to separately shape each tunable passband. Thus, high-selectivity multi-band bandpass filtering transfer functions exhibiting independent control in terms of center frequency, bandwidth, and transmission zeros can be synthesized. Furthermore, as an unprecedented frequency-agility feature of the proposed reconfigurable multi-band BPF structure when compared to the state-of-the-art, its passbands can be merged together to form broader, and for certain realizations, higher order transmission bands. This allows even more degrees of reconfiguration to be achieved in the devised circuit, which can also operate as ultra-wideband BPF with flexible in-band notches or self-equalized flat-group-delay quasi-elliptic-type BPF. The theoretical foundations of the described reconfigurable multi-band BPF scheme, along with guidelines for its design and a triple-passband filter synthesis example based on the coupled-node formalism, are expounded. In addition, as an experimental proof-of-concept, two microstrip prototypes with high- $Q$ tuning implemented through mechanically variable capacitors are manufactured and tested. They are a wideband dual-band BPF and a quadruple-band BPF with narrow-bandwidth passbands.
Journal ArticleDOI
Compact Microstrip UWB Bandpass Filter With Dual Notched Bands Using E-Shaped Resonator
TL;DR: In this paper, a new microstrip ultra-wideband (UWB) bandpass filter with two sharp notches using E-shaped resonator is proposed and the circuit topology and its corresponding electrical parameters of the initial microstrip UWB BPF are achieved by a variation of GA.
Journal ArticleDOI
Front-End Narrowband Interference Mitigation for DS-UWB Receiver
TL;DR: An interference mitigation scheme based on complex-valued adaptive notch filter, which smartly exploits the substantial correlation difference of signals and removes the NBIs in UWB signal with noise by estimating the corresponding central frequencies.
Journal ArticleDOI
Ultraminiaturized Wideband Quasi-Chebyshev/-Elliptic Impedance-Transforming Power Divider Based on Integrated Passive Device Technology
TL;DR: This article presents the ultraminiaturized wideband quasi-Chebyshev and -elliptic low-pass power dividers (PDs) with an impedance-transforming function using integrated passive device (IPD) technology, occupying only the sizes of $1.1\times1.2$ and 2 and
Journal ArticleDOI
Meta-programmable analog differentiator
TL;DR: In this article , the fundamental ingredient of wave-based signal differentiation, namely zeros of the scattering matrix that lie exactly on the real axis, can be imposed at will and in situ by purposefully perturbing an overmoded random scattering system.
References
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TL;DR: In this article, the authors presented a study program to advance the state of the art in UHF limiters, octave-band ferrite circulators, and low-noise receivers having linear phase response suitable for pulse-compression applications.
Journal ArticleDOI
Ultra-Wideband (UWB) Bandpass Filter With Embedded Band Notch Structures
Hussein Shaman,Jia-Sheng Hong +1 more
TL;DR: In this article, a compact ultra wideband (UWB) bandpass filter with narrow notched (rejection) band in the UWB passband realized on a microstrip line is implemented and presented for use in wireless communication applications within the unlicensed UWB range set by the Federal Communications Commission (FCC).
Journal ArticleDOI
Intermodulation distortion and power handling in RF MEMS switches, varactors, and tunable filters
TL;DR: In this article, the authors present a theoretical and experimental study of the nonlinear effects generated RF-microelectromechanical system (MEMS) varactors and capacitive switches.
Journal ArticleDOI
A UWB-IR Transmitter With Digitally Controlled Pulse Generator
Takayasu Norimatsu,Ryosuke Fujiwara,Masaru Kokubo,M. Miyazaki,A. Maeki,Yuji Ogata,Satoru Kobayashi,Noboru Koshizuka,Ken Sakamura +8 more
TL;DR: A novel transmitter for ultra-wideband (UWB) impulse radio has been developed and the proposed architecture enables low-power operation, simple design, and accurate pulse-shape generation.