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CPW-FED SLOT-OSCILLATORS FOR POWER COMBINING APPLICATIONS
CPW-FED SLOT-OSCILLATORS FOR POWER APPLICATIONS COMBINING Brian K. Kormanyos*, William and Gabriel M. Rebeiz* Harokoupos, Jr.*, Linda P.B. Katehi* ABSTRACT We have combined integrated circuit antenna technology with microwave oscillator design to build an active slot-oscillator. The design is planar, does not require via holes and is compatible with monolithic transistor technology. The copl
WEATHER FORECASTING RADAR ANTENNA: AN APPLICATION OF ACTIVE MICROSTRIP ANTENNAS
WEATHER FORECASTING RADAR ANTENNA: AN APPLICATION OF ACTIVE MICROSTRIP ANTENNAS T. Razban*, B. Robert* ABSTRACT: In this paper we propose an original antenna structure which may be used in weather forecasting radars. It is composed of microstrip radiating elements, active circuits and microstrip power splitters. This antenna may take place of the heavy and expensive existing parabolic structure
ROTMAN LENS IN MICROSTRIP TECHNOLOGY
ROTMAN LENS IN MICROSTRIP TECHNOLOGY Borje Carlegrim, Lars Pettersson Abstract A microwave lens of Rotman type, to be used in a broadband multibeam antenna, has been designed in microstrip technology. The method of analysis used, based on a ray approach, is briefly described and compared for a circular geometry with a, in some respect, rigorous method. The design of a Rotman lens with 15 beam port
THEORY AND MEASUREMENTS OF A COMPACT HIGH DIELECTRIC MICROSTRIP ROTMAN LENS
THEORY AND MEASUREMENTS OF A COMPACT HIGH DIELECTRIC ROTMAN LENS MICROSTRIP E 0 Rausch * , A F Peterson ** ABSTRACT A compact microstrip lens operating at frequencies between 1.33 and 4 GHz was designed and tested. The measurements included the complete scattering matrix as well as the multibeam radiation patterns. In addition, a contour integral equation formulation was developed to predict th
THE USE OF INHOMOGENEOUSLY LOADED RECTANGULAR WAVEGUIDE TO OVERCOME GRATING LOBES AND DISTRIBUTION TAPER LIMITATIONS IN TRANSVERSE SLOT ARRAYS
THE USE OF INHOMOGENEOUSLY LOADED RECTANGULAR WAVEGUIDE TO OVERCOME GRATING LOBES AND DISTRIBUTION TAPER LIMITATIONS IN TRANSVERSE SLOT ARRAYS J Joubert', J C Coetzee' ABSTRACT The ability to analyse transverse slots in inhomogeneously loaded rectangular waveguide creates new design possibilities for slotted waveguide arrays. In order to demonstrate some of these advantages, this paper presents
ANALYSIS OF MUTUAL COUPLING IN SLOTTED-WAVEGUIDE ARRAYS
ANALYSIS OF MUTUAL Hanyang Wang*, A J Sangster* ABSTRACT COUPLING IN SLOTTED-WAVEGUIDE ARRAYS A moment method analysis of slot radiators in waveguide is described which includes both the internal and external mutual coupling associated with neighbouring radiators. A particular feature of the analysis is that the computation of external mutual coupling is now incorporated directly into the mome
THERMAL DESIGN OF HBT POWER TRANSISTORS FOR MOBILE AND SATELLITE COMMUNICATIONS
Thermal Design of HBT Power Transistors for Mobile and Satellite Communications R.Mezui-Mintsa, M.Tsouli, Z.Enkonda, N.HassaYne, M.Riet, B.Villeforceix., A.Konczykowska, S.Vuye, H.Wang Abstract HBT power transistors thermal analysis and its application to amplifier design are presented in this paper. Device analysis and optimization have been made with respect to the power handling capability. Po
GATE-FEEDBACK MESFET GRIDS FOR MICROWAVE POWER COMBINING
Gate-Feedback R.M. Weikle, II., Abstract MESFET Grids for Microwave Power Combining D.B. Rutledget Solid-state devices that produce power in the microwave and millimeterwave region of the spectrum have relatively low power outputs compared to their vacuum tube counterparts. To overcome this limitation, a large variety of power combining schemes have been developed. One of the most promising
MESFET FREQUENCY MULTIPLIERS INCLUDING DETECTORLESS ALC
MESFET FREQUENCY M. Piloni, ABSTRACT M. Brambilla MULTIPLIERS (*) INCLUDING DETECTORLESS ALC This paper describes a novel design of MESFET based frequency multipliers with automatically stabilized output power level. This particular circuit configuration beside generating the desired output harmonic, allows to stabilize the output power level without inserting any additive control and detecto
A COMPARISON BETWEEN DIFFERENT STABILIZING MODES OF FET HARMONIC-MODE OSCILLATORS
A COMPARISON OSCILLATORS 0 A Abo-Elnor, BETWEEN DIFFERENT STABILIZING MODES OF FET HARMONIC-MODE K Schuenemann * ABSTRACT In this paper, a cavity stabilized FET harmonic-mode oscillator is investigated. The cavity is inserted in the fundamental or harmonic circuit. A comparison for these two modes of stabilization is made between the different possible types of cavities, i.e., reaction, tra