Design of broadband RF transceiver front-end using highly selective diplexer and high Q-factor hybrid resonator bandpass filters

2015 ◽

Vol 7 (3-4) ◽

pp. 211-218 ◽

Cited By ~ 1

Author(s):

Simone Bastioli ◽

Richard V. Snyder

Keyword(s):

Insertion Loss ◽

Bandpass Filters ◽

Experimental Results ◽

The Other ◽

Q Factor ◽

Evanescent Mode ◽

High Q ◽

Transmission Zeros ◽

Waveguide Cavities ◽

A New Technique

A new technique to realize quasi-elliptic bandpass filters with extreme close-in rejection is presented in this paper. The basic idea consists of embedding non-resonating mode waveguide cavities within the structure of an evanescent-mode filter. Such a combination of cavities and resonators allows the generation of very close transmission zeros while realizing at the same time relatively wide passbands and stopbands. Both H-plane TE201 mode and E-plane TM110 mode configurations are used as non-resonating mode waveguide cavities. In contrast with the other elliptic evanescent-mode filters using conventional approaches, the insertion loss degradation at the filter cut-off frequencies is minimized thanks to the high-Q factor of the waveguide cavities, whose corresponding poles are located right at the edges of the passband. The experimental results of an evanescent-mode filter having 9.950–11.000 GHz passband and providing more than 45 dB rejection between 11.040 and 11.050 GHz validate the proposed solution.

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A Novel Diplexer Integrated With a Shielding Case Using High $Q$ -Factor Hybrid Resonator Bandpass Filters

IEEE Microwave and Wireless Components Letters ◽

10.1109/lmwc.2018.2804174 ◽

2018 ◽

Vol 28 (3) ◽

pp. 215-217 ◽

Cited By ~ 3

Author(s):

Trong-Hieu Le ◽

Xiao-Wei Zhu ◽

Chuan Ge ◽

Tuan-Viet Duong

Keyword(s):

Bandpass Filters ◽

Q Factor ◽

High Q

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Tunable Voltage-Mode Bandpass Biquad Synthesis Using NAM Expansion Method

Journal of Circuits System and Computers ◽

10.1142/s0218126616500481 ◽

2016 ◽

Vol 25 (05) ◽

pp. 1650048 ◽

Cited By ~ 1

Author(s):

Huu-Duy Tran ◽

Hung-Yu Wang ◽

Chin-Shiuh Shieh ◽

Min-Chuan Lin ◽

Sin-Hong Lin

Keyword(s):

Natural Frequency ◽

Expansion Method ◽

Bandpass Filters ◽

High Order ◽

Q Factor ◽

High Q ◽

Voltage Mode ◽

Admittance Matrix ◽

Mode Parameter ◽

Synthesis Procedure

The synthesis of voltage-mode parameter tunable biquadratic bandpass filters using grounded capacitors is presented. To easily construct high-order filters, the synthesis of voltage-mode cascadable tunable biquadratic bandpass filters is also indicated. The synthesis procedure is based on the nodal admittance matrix (NAM) expansion method using nullor–mirror pathological elements. The synthesis of filters using grounded capacitors is considered since it is helpful for easing the elimination/accommodation of various parasitic effects for monolithic integration. The Q factor of the derived filters can be adjusted without changing the natural frequency, so the high-Q bandpass filters are attainable. The workability of some synthesized circuits is verified by HSPICE simulations.

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High-Q-Factor Tunable Silica-Based Microring Resonators

Photonics ◽

10.3390/photonics8070256 ◽

2021 ◽

Vol 8 (7) ◽

pp. 256

Author(s):

Yue-Xin Yin ◽

Xiao-Pei Zhang ◽

Xiao-Jie Yin ◽

Yue Li ◽

Xin-Ru Xu ◽

...

Keyword(s):

Optical Communications ◽

Microring Resonator ◽

Microring Resonators ◽

Q Factor ◽

Notch Depth ◽

Critical Coupling ◽

Practical Application ◽

Coupling Condition ◽

High Q ◽

Racetrack Resonator

A high-Q-factor tunable silica-based microring resonator (MRR) is demonstrated. To meet the critical-coupling condition, a Mach–Zehnder interferometer (MZI) as the tunable coupler was integrated with a racetrack resonator. Then, 40 mW electronic power was applied on the microheater on the arm of MZI, and a maximal notch depth of about 13.84 dB and a loaded Q factor of 4.47 × 106 were obtained. The proposed MRR shows great potential in practical application for optical communications and integrated optics.

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Dielectric-loaded L-band filters for high-power space applications

International Journal of Microwave and Wireless Technologies ◽

10.1017/s1759078721000982 ◽

2021 ◽

pp. 1-11

Author(s):

Paolo Vallerotonda ◽

Fabrizio Cacciamani ◽

Luca Pelliccia ◽

Alessandro Cazzorla ◽

Davide Tiradossi ◽

...

Keyword(s):

High Power ◽

Dielectric Resonators ◽

Q Factor ◽

Rf Power ◽

Space Applications ◽

High Q ◽

Critical Issues ◽

L Band ◽

Multipactor Discharge ◽

Filter Response

Abstract The design and first experimental results of Tx and Rx L-band bandpass filters for a high-power satellite diplexer are presented in this paper. Designed in the framework of an ESA ARTES AT project, the filters are based on TM010 mode dielectric resonators. These resonators allow for better results in terms of volume occupation with respect to other dielectric resonators still maintaining high Q-factor values (>2000). Volume saving above 30% is achieved with respect to standard coaxial filters. The filter geometries and materials have been chosen in order to improve the power-handling and to cope with related critical issues for space applications (i.e. avoid any multipactor discharge in the operating RF power range and low-PIM response). Measurements of Tx filter show good correlation with the design in terms of central frequency, BW, and unloaded Q-factor (almost 3000). Measurements of Rx filter show a worse correlation with the design in terms of filter response shape. This is ascribed to size tolerances of one of the filter resonators. Multiple analyses are ongoing to remove this degradation in the final engineering model.

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