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Passive Components

Research@mwjournal.com

Comprehensive overview of microwave technology research projects currently being investigated by European academic institutions and commercial organizations
European Supplement Research@mwjournal.com Richard Mumford Microwave Journal European Editor A commitment to well funded, focused, commercially viable research is critical to the future prosperity of the microwave industry. In this special report Microwave Journal takes a snapshot of the research projects being investigated by academic and commercial establishments across...
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Fast Design of Cross-coupled Filter Substructures

Demostration of how three-dimensional electromagnetic analysis can speed up the realization process of cascaded tri-section bandpass filters
Application Note Fast Design of Cross-coupled Filter Substructures Cross-coupled narrow bandpass filters with asymmetric transmission zeros can be realized in cascaded tri-section topology.1,2,3 Each tri-section creates a single transmission zero below or above the passband. The realization of resonator tri-sections is relatively difficult due to the interaction between the...
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Finite Element Determination of the Intrinsic Small-signal Equivalent Circuit of MESFETs

Description of a theoretical procedure used to calculate the intrinsic elements of a FET small-signal equivalent circuit
TECHNICAL FEATURE Finite Element Determination of the Intrinsic Small-signal Equivalent Circuit of MESFETs The finite element time domain method is used to determine the intrinsic elements of a broadband, small-signal equivalent circuit (SSEC) of FETs. The values of the different elements are calculated from the Y parameters of the...
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A Method of Measuring Large-signal S-parameters of High Power Transistors

Determination of large-signal scattering parameters of high power transistors from measured data during normal operation
TECHNICAL FEATURE A Method of Measuring Large-signal S-parameters of High Power Transistors A measurement method for scattering parameters (S-parameters) of high power transistors is presented. The proposed method directly determines the S-parameters of high power transistors by measuring overall gain, phase and S-parameters of input and output matching network...
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Design of a Planar Microstrip Balun at S-band

Design, simulation and measured results of a planar microstrip balun at S-band
TECHNICAL FEATURE Design of a Planar Microstrip Balun at S-band An innovation for the Marchand balun model is presented. The structure of the designed planar microstrip matching circuit is fairly simple, practical and easily fabricated without requiring complex multiple metal or dielectric layers. Moreover, the designed balun performs well....
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* Two Novel Radar Vehicle Detectors for the Replacement of a Conventional Loop Detector

Introduction to intrusive and non-intrusive radar vehicle detectors developed at 24 GHz
TECHNICAL FEATURE Two Novel Radar Vehicle Detectors for the Replacement of a Conventional Loop Detector In this article, intrusive and non-intrusive radar vehicle detectors, compatible with existing inductive loop detectors (ILD) without any modification of the communication algorithm, have been developed at 24 GHz. The intrusive detector is based...
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A Ka-band Planar Printed Antipodal Linearly-tapered Slot Antenna

Measurement, fabrication and design of a 27 to 32 GHz Ka-band planar antipodal linearly-tapered slot antenna
TECHNICAL FEATURE A Ka-band Planar Printed Antipodal Linearly-tapered Slot Antenna A Ka-band (27 to 32 GHz) planar antipodal linearly-tapered slot antenna (ALTSA) is designed, fabricated and measured. The numerical simulation was performed by 3D finite-element method (FEM). The printed ALTSA has been realized by using an RT/Duroid printed circuit...
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Complex Coaxial-waveguide Transitions at Millimeter-waves

Description of two types of coaxial-waveguide transtitions experimentally investigated over a wide frequency range at millimeter-waves
TECHNICAL FEATURE Complex Coaxial-waveguide Transitions at Millimeter-waves Millimeter-waves have been used in commercial applications during the last decade as a result of the growing development of microwave multipoint distribution systems, local multipoint distribution systems, and digital audio and video broadcasting. In spite of many proposed simulation methods, experimentation remains...
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MEMS for RF/Microwave Wireless Applications: The Next Wave ­ Part II

Description of the possibilities afforded by MEMS in system integration and novel architectures
TUTORIAL MEMS for RF/Microwave Wireless Applications: The Next Wave ­ Part II Microelectromechanical systems (MEMS) technology is on the verge of revolutionizing RF and microwave applications.1 The requirements of present day and future RF and microwave systems for lower weight, volume, power consumption and cost with increased functionality, frequency...
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Low Phase Noise Voltage Tunable Oscillators

Introduction to a new line of fast tuning, low phase noise voltage tunable oscillators
PRODUCT FEATURE Low Phase Noise Voltage Tunable Oscillators Paratek Columbia, MD Driven by the VCO market's insatiable need for lower phase noise and wider tuning ranges, a new line of voltage tunable oscillators (VTO) has been introduced with superior performance in these areas. The new VTOs operate at fundamental...
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