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Thermal Coupling in Multi-finger Heterojunction Bipolar Devices Martin Schumer*, Viktor Krozer+, Jesus Grajal de la Fuente**, Hans L. Hartnagel* * TH Darmstadt, Institut fur Hochfrequenztechnik, 25, D-64283 Darmstadt, Germany, email: hfmwe008-hrzpub.th-darmstadt.de + TU Chemnitz-Zwickau, Lehrstuhl fur Hochfrequenztehnik, 70, D-09126 ** Merckstr. Reichenhainerstr. Chemnitz, Spain. Germany, em

A Novel Extraction Method for Temperature Dependent Large Signal Equivalent Circuit Model of HBT Young-Suk Suh, Tai Moon Roh*, Youngsik Kim*, Jinho Shin*, and Bumman Kim* Mfiliation: Dept. of Electronics Eng., Yeungnam University, Dept. off E.E, POSTECH, * Address: Dept. Of Electronics Eng., Yeungnam University, Kyong-San, Kyong-Buk, 712-749, South Korea. Abstract A new equivalent circuit paramete

NONLINEAR MODELING INCLUDING THE SELF HEATING EFFECT AND LOAD-PULL MEASUREMENTS OF GalnP/GaAs POWER HBTs M. Akpinar, R. Follmann, T. Sporkmann and I. Wolff Germany Institut fUr Mobil- und Satellitenfunktechnik Carl- F riedrich-GauB-Stral3e 2, D-4 74 7 5 Kamp- Lintfort, Tel: +49-2842-981-200, Fax: +49-2842-981-299 Abstract A practical method to model HBTs including the self-heating effect has b

LUMPED COUPLED RING ANTENNA ARRAY D.E.J. Humphrey, V.F. Fusco High Frequency Electronics Laboratory Department of Electrical and Electronic Engineering, The Queen's University of Belfast, Ashby Buildings, Stranmillis Road, Belfast, BT9 5AH, N.Ireland, United Kingdom. Tel: +44 (0)1232 274087, Fax: +44 (0)1232 667023 e-mail: d.humphrey-ee.qub.ac.uk/v.fusco-ee.qub.ac.uk ABSTRACT Arrays of coupled ac

Novel retrodirective beam formation techniques s. L. Karode, v. F. Fusco High Frequency Electronics Laboratory Department of Electrical and Electronic Eng. The Queen's University of Belfast, Ashby Building Stranmillis Road, Belfast, BT9 5AH, N. Ireland Tel +4401232245133 Ext. 4089, Fax. +44 01232 667023 e-mail s.karode-ee.qub.ac.uk/v.fusco-ee.qub.ac.uk ABSTRACT This paper presents two novel activ

Electrical and Mechanical Design of the AMOS Communication Antenna Subsystem M. Lieke*, c. Hunscher* , T. Kutscheid*, E. Ze'evi** *Dornier Satellitensysteme GmbH **IAIIMBT Summary of a paper for session C1 of the 27th European Microwave Conference Point of Contact: Manfred Lieke Domier SatelIitensysteme GmbH PO Box 80]] 69, 81663 Munich, Germany Tel: +49-89-607-2 85 68 Fax. +49-89-607-2 33 84 E-m

Dual Shaped Reflector Antenna for Airport CW radar Jacob Meshy, MichaelNegev - Antenna Dept. ELTA Abstract Modem airports require an accurate search radar to control the ground traffic in an airfield environment. The radar uses the CW mode to help operate in a high clutter area, covered with buildings and other obstacles. Two collinear, separate antennas are used for transmit and receive, requiri

A High Precision Analog Frequency-Ramp Generator Phase-Locked-Loop Structure Thomas Musch and Burkhard Schiek Ruhr Universitat Institut UniversitatsstraBe D-44780 Bochum, Bochum 150 Germany fur Hochfrequenztechnik Using a ABSTRACT A high precision analog frequency-ramp-generator has been developed. The highly linear frequency-ramp is generated using a Phase-Locked-Loop (PLL) circuit design. It

A NOVEL LOW NOISE ACTIVE LARGE TOKER, CIRCUIT REPLACEMENT SCALE ACTIVE ANTENNA ALTUNKAN HIZAL Eng. Dept. CRITERIA ARRAYS FOR PARALLEL FED SIMSEK DEMIR, CANAN Middle East Technical 06531, Ankara, University, Electrical and Electronics TURKEY A bstmct: In this work noise analysis of parallel feed structures for active antenna arrays are presented. Signal and noise behaviour of the f