TCAR, the Transatlantic Cooperative AGS Radar: A Programmatic and Technical Overview

In view of the NATO Air to Ground Surveillance requirement a feasibility study on the development of an advanced SAR/MTI radar system has been conducted by a group of industries from 6 nations (FR, GE, IT, NL, SP, USA). The architectural design of the system is based on knowledge from currently ongoing radar programs in these countries. A...

Low-Cost Surface Mount Millimeter-Wave Transceiver Modules for LMDS Applications

Dispersion Free Doped and Undoped AlGaN/GaN HEMTs on Sapphire and SiC Substrates

We present dispersion free pulsed current voltage (I-V) and radio frequency (RF) power results of undoped and doped AlGaN/GaN HEMTs on sapphire and SiC substrates. The most significant processing step leading to these results is the application of a reactive ion etching (RIE) argon (Ar) plasma (10sccm, 40mTorr, 20W, t=30s, DC bias = -167V, 20gr....

Problem-Matched Basis Functions for Microstrip Coupled Slot Arrays based on Transmission Line Green+s Functions (TLGF)

A method is proposed for the analysis of arrays of linear printed antennas. After the formulation of pertinent set of integral equations, the appropriate equivalent currents of the Method of Moments are represented in terms of two sets of entire domain basis functions. These functions synthesize on one side the resonant behavior of the slot,...

Efficient Design of a Frequency Selective Surface for a Multi Functional Radar: Theory and Measurements

This paper describes an efficient methodology for the design of steep roll-off Frequency Selective Surfaces (FSS’s). The proposed technique is based on the Multimode Equivalent Network (MEN) approach, which was originally developed for the analysis of waveguide junctions. The MEN has been extended to the study of multi-layer patch based and...

A 1-Watt Ku-band Power Amplifier MMIC using Cost-effective Organic SMD Package

Low-Cost Millimeter-Wave Transceiver Module using SMD packaged MMICs.

This paper presents a novel approach to realize low-cost millimeter-wave modules using only SMD packaged MMICs integrated on a single organic substrate. This approach is demonstrated on a 38 GHz transceiver module for point-to-point LMDS communication systems. The required SMD package technology and demonstrator have been developed in the 5th...

On the Stability of MMIC+s Using Transistors with Inductive Source Feedback

This paper describes potential stability problems occurring in transistor stages with inductive source feedback. These problems occur at very high frequencies, where modelling of passive components is far from trivial. Due to the increase in maximum operating frequency of submicron pHEMT transistors, this problem is recently attracting attention...

Novel Organic SMD Package for High-Power Millimeter Wave MMICs

In this paper a novel low-cost SMD package for high-power MMICs is presented. Due to the special design this package has a very low thermal resistance and low parasitic ground inductance. 3D EM simulations of a packaged through-line correspond well with measurements. Measurement results of a 1 Watt 40 GHz HPA before and after packaging are...

Novel Organic SMD Package for High-Power Millimeter Wave MMICs

In this paper a novel low-cost SMD package for high-power MMICs is presented. Due to the special design this package has a very low thermal resistance and low parasitic ground inductance. 3D EM simulations of a packaged through-line correspond well with measurements. Measurement results of a 1 Watt 40 GHz HPA before and after packaging are...

Design of a Small, Low Cost, P-Band Airborne Polarimetric Synthetic Aperture Radar

A preliminary study of the design of a small, low cost, P-band airborne, polarimetric Synthetic Aperture Radar desired by the Wageningen University and the Borneo Orangutan Survival Foundation (BOS) to carry out forest biomass monitoring in Indonesia is presented. The requirements of the application are established and the main radar parameters...

Development of a High Resolution Airborne Millimeter Wave FM-CW SAR

The combination of compact FM-CW radar technology and high resolution SAR processing techniques should pave the way for the development of a small, lightweight and cost effective imaging radar. In the field of airborne earth observation, SAR is however a novel application for FM-CW radars. At IRCTR a project was started to investigate the...

Planar Circularly Symmetric EBG Structures - Design and Analysis.

This paper deals with the design and the analysis of planar circularly symmetric (PCS) EBG structures. The analysis is concentrated on TM excitations. To obtain simple design rules for the PCS-EBG’s, an equivalence is established between 2DEBG’s and PCS-EBG’s. he dispersion equations are investigated first. The 2D problems are studied by means...

Highly-integrated X-band multi-function MMIC with integrated LNA and driver amplifier

The design and performønce of a highly integrated X-band multi-function MMIC with integrated LNA and high output power wìll be discussed, The MMIC integrates all the control functions of a lransmit/receive module, The integralion of a Low Noise Amplifier and Driver Amplifier makes lhis MMIC exlremely suilable for a two chip T/R module solution....

Dual transimpedance amplifier for 43 Gbps applications

A 3-stage dual TransImpedance Ampffier (TIA) on one 2x7.8 mm2 GaAs chip with 0.2 pm pHEMT technologt has been designed for fiberoptic communication applications. It uses cascode connected common source FETs in a Constant-K configuration. The operating frequency ranges from DC to 3 5 GHz, The TIA is desígned for a diode capacítance of 120 fF. The...

Integrated InP circuits and Si TTD for analogue optical beamforming applications

In future microwave systems, there will be an increasing need for wide bandwidths. Electronically steered antennas with bandwidths up to an octave or more are foreseen. The beamforming for these systems is problematic. The systems are generally in need of time-steering instead of phase-steering. Electrical true time-delays (TTD) are difficult to...

PHARS: A C-band Airborne SAR.

For the study of microwave scattering of vegetation, forests, sea and other targets groundbased and airborne scatterometers and a digital SLAR system (X-band) are used since many years in The Netherlands. All these systems are absolutely calibrated. The experience gained with building radar remote sensing systems led to the development of a...