IEEE NTC,Conference Proceedings Microwave Systems Conference

17-19 May 1995

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  • IEEE NTC '95 The Microwave Systems Conference. Conference Proceedings

    Publication Year: 1995
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    Freely Available from IEEE
  • Index

    Publication Year: 1995
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    Freely Available from IEEE
  • A low cost 3.6 V single-supply GaAs power amplifier IC for the 1.9-GHz DECT system

    Publication Year: 1995, Page(s):37 - 40
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (240 KB)

    A GaAs power amplifier IC in a SOIC-16 plastic package has been developed for the 1.9 GHz Digital European Cordless Telephone (DECT) system. The power amplifier consists of two stages with all matching structures on chip and has a total area of 1.84 mm2. At -2 dBm input power and 3.6 volts, the typical power amplifier achieves 26 dBm output power with 30% power-added efficiency, while o... View full abstract»

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  • A double-polysilicon bipolar process with a 0.3-μm minimum emitter width and NMOS transistors for low power wireless applications

    Publication Year: 1995, Page(s):33 - 36
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (516 KB)

    A 0.6-μm 3.5-V silicon bipolar process is developed for low power and high speed operation in wireless applications. The process features 35-GHz fT bipolar transistors with a 0.3-μm electrical emitter width, lateral pnp transistors, polysilicon-to-n+ plug capacitors, NMOS transistors with a 10-nm gate oxide layer for low on-resistance, and inductors fabricated using a d... View full abstract»

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  • MMIC antenna front end for optically distributed MMW antennas

    Publication Year: 1995, Page(s):171 - 174
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (260 KB)

    It is well documented that fiber optic remoting of information to the millimeter wave distributed antennas is viable only when the modulated carrier is constructed at the antenna front end. The MMIC based antenna front is designed to perform three important functions of (i) generation of phase and frequency stable local oscillator, (ii) down-conversion (up-conversion) of the modulated RF (IF) carr... View full abstract»

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  • A novel 3 V, 7 mA PHEMT GaAs active MMIC mixer/LNA for wireless applications

    Publication Year: 1995, Page(s):29 - 32
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (468 KB)

    A novel monolithic integrated active mixer/LNA utilizing advanced pseudomorphic GaAs FETs has been developed for a mobile wireless receiver. RF coverage is 900 MHz to 2400 MHz. The mixer/LNA operates on a single 3 volt supply at 7 mA. The mixer provides 4 dB conversion gain with a -10 dBm LO drive. The LNA provides a 1.6 dB noise figure and 14 dB gain. The die is small and packaged in the SSOP-16 ... View full abstract»

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  • Coded 24 GHz Doppler radar sensors: a new approach to high-precision vehicle position and ground-speed sensing in railway and automobile applications

    Publication Year: 1995, Page(s):101 - 104
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (360 KB)

    Coded 24 GHz Doppler sensors have been realized to perform high-precision non-contact vehicle position and speed measurements. Encoding the radar signal with a spread-spectrum code is the key to a significantly enhanced sensitivity combined with a range selectivity of the sensor. The novel system concept establishes a high-performance low-cost vehicle Doppler radar system with very high measuremen... View full abstract»

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  • Expanding search code acquisition receiver structure, simulation and analysis

    Publication Year: 1995, Page(s):149 - 152
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (284 KB)

    In the area of direct sequence spread spectrum (DSSS) communications, a code phase search is required for coarse code acquisition. In the case of a typical Global Positioning System (GPS) receiver, the receiver acquisition of the C/A code narrows the uncertainty for Precise (P) code acquisition. Depending upon the pdf of the code phase uncertainty, various search algorithms may be employed for P c... View full abstract»

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  • Novel algorithms for FMCW range finding with microwaves

    Publication Year: 1995, Page(s):129 - 132
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (252 KB)

    The output of a conventional FMCW ranging measurement is the real-part of the free-space transfer function. However, the missing imaginary part leads to an artificial but non-negligible measurement error, when employing a Fourier transform for distance evaluation. Novel algorithms for processing the FMCW measurement raw data are described, allowing complete suppression of the aforementioned image-... View full abstract»

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  • Over-temperature noise modeling of PHEMTs

    Publication Year: 1995, Page(s):247 - 250
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (180 KB)

    A new procedure is presented for modeling the variations with temperature of the noise source coefficients related to the gate and the drain of a field effect transistor (FET). The experimental results obtained for a temperature range over -60°C to 140°C are compared to two recent similar studies, using a pseudomorphic HEMT. It is demonstrated that good agreement can be obtained for some o... View full abstract»

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  • X-band receiver protector using glass technology

    Publication Year: 1995, Page(s):167 - 170
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (328 KB)

    The paper describes a receiver protector providing passive limiting and active switching for an X-band phased array radar. The 1650 μm×4440 μm circuit uses a glass integrated circuit process and discrete PIN diodes to achieve: loss: 1.0 dB. VSWR: 1.25:1. Isolation: 40 dB. Power handling: 10 W CW View full abstract»

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  • A novel microwave omnidirectional antenna for wireless communications

    Publication Year: 1995, Page(s):221 - 224
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (264 KB)

    A novel microwave omnidirectional antenna is proposed in this paper for wireless communications. This antenna is constructed with cavity-restrained multi-stacked dielectric disks. Vertical polarized omnidirectional radiation patterns are obtained from radiative ring slots in the side wall of dielectric-metal cavities operating on TM01δ mode. High omnidirectional gain is realized w... View full abstract»

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  • A low-current linearity sweet spot in HFETs

    Publication Year: 1995, Page(s):25 - 28
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (212 KB)

    Planar doped HFETs exhibit a narrow bias region of low intermodulation distortion, a linearity sweet spot, at low drain current levels. The bias condition associated with this sweet spot is shown to be near the low-current inflection point of the transconductance versus gate voltage characteristic. It is also shown that the bias condition for the sweet spot can be controlled in dual-gate HFETs. Th... View full abstract»

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  • A miniature 17/12 GHz MMIC receiver for satellite communication

    Publication Year: 1995, Page(s):97 - 100
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (340 KB)

    We have developed a novel high gain, low noise, miniature 17/12 GHz receiver with MMIC insertion for satellite communication. This receiver has a nominal conversion gain of 60+/-0.25 dB with gain adjustment range of 60 dB and noise figure of 1.6 dB. The third order intermodulation is 32 dBc @ -50 dBm input drive level, from 17.3 to 17.8 GHz at room temperature. It has a size of 5.7×1.8×... View full abstract»

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  • Paradigm shift in RF avionics sensor implementation

    Publication Year: 1995, Page(s):53 - 56
    Cited by:  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (312 KB)

    Military avionics developers have increasing impetus to provide more capability at lower cost. Coupled with these user needs are an increasing focus on the application of commercial off-the-shelf products and technology. The scope of sensor system design is focusing from highly autonomous to networked operation. Thus, military avionics are evolving to a form more synergistic with commercial telesy... View full abstract»

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  • A test target generator for wideband pulsed Doppler radars

    Publication Year: 1995, Page(s):109 - 111
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (244 KB)

    A test target simulator (TTS) based on a fiber-optic delay line (FODL) has been designed for realistic testing and characterizing of wideband pulsed Doppler radars. The TTS can simulate one or two targets at different radar cross sections (RCSs), different Doppler, and different ranges in the presence of uncorrelated noise or interference. With one target, clutter and multipath effects can also be... View full abstract»

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  • A highly efficient, small size 50 watt power amplifier for mobile satcom applications

    Publication Year: 1995, Page(s):145 - 147
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (368 KB)

    This paper describes the development of a 50 watt power amplifier operating in the Ku-band satellite uplink frequency range of 14-14.5 GHz. High efficiency (greater than 25%), very small size (less than 35 cubic inches) and light weight (2.3 lbs) make this amplifier an ideal choice for use in mobile satellite terminals. Details of the development effort, a description of the developed product, and... View full abstract»

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  • Two frequency multifunctional radar for mobile application

    Publication Year: 1995, Page(s):125 - 128
    Cited by:  Papers (6)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (196 KB)

    A radar system for vehicles is presented working with two modules at different frequencies and a special arrangement of the modules. From the resulting Doppler spectra in the baseband and in the IF band the velocity, the tilt angle and the height with respect to ground, the direction of the movement of a vehicle and the classification of the road condition can be derived. Even if the baseband sign... View full abstract»

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  • Simulation of a UHF-band indoor wireless TCDMA system based on multipath fading radio channel modeling

    Publication Year: 1995, Page(s):243 - 246
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (280 KB)

    A hybrid access scheme called time code division multiple access (TCDMA) is proposed for indoor wireless communications. The indoor radio channel is modeled in terms of channel impulse response by taking into account various indoor measurement results. Various simulation methods are used to reduce the computational complexity and to ensure the result accuracy. The simulation results of system perf... View full abstract»

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  • An 18 GHz circularly polarised multilayer active microstrip antenna subarray using MMIC amplifiers

    Publication Year: 1995, Page(s):163 - 166
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (496 KB)

    The paper presents an 18 GHz circularly polarised multilayer active antenna subarray using MMIC amplifiers. With the advantage of a multilayer structure, the radiation patterns from the antenna side are not affected by the radiation from circuit side. An extra gain of 15.46 dB has been measured in comparison to the passive array. This type of array can be the ideal building block for large microst... View full abstract»

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  • HF array simulations

    Publication Year: 1995, Page(s):233 - 236
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (308 KB)

    The Ionospheric Research Instrument (IRI) is an HF transmitting array facility currently being constructed in Gakona, Alaska, as part of the HF Active Auroral Research Program (HAARP). This program will result in an ionospheric heater facility in the auroral region, dedicated to the exploration of ionospheric phenomena that can be induced by ionospheric modification. For an HF array where the tran... View full abstract»

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  • SAW sensor system application

    Publication Year: 1995, Page(s):215 - 218
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (356 KB)

    The article gives an overview of the capabilities of sensor systems combining the basic principles of SAW identification (ID) tags with the properties of SAW sensors. The concept of SAW telemetry systems created in this way has several advantages compared with other solutions, with the two most important being that the sensors themselves do not require any separate energy source when operating, an... View full abstract»

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  • A low cost mixer for wireless applications

    Publication Year: 1995, Page(s):21 - 24
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (204 KB)

    A new GaAs integrated circuit mixer is presented that services wireless communication requirements. Low cost, small size and good electrical performance are achieved through the use of a one balun-one FET scheme, a mature MESFET process and plastic packaging. Measured data is shown for 900 MHz and 1800 MHz parts. This MMIC mixer offers the best performance-to-price ratio in the marketplace View full abstract»

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  • A C-band beam-forming matrix for phased-array antenna applications

    Publication Year: 1995, Page(s):189 - 192
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (1096 KB)

    A design description and measured performance of a modular beam-forming matrix (BFM) are presented. Advanced GaAs monolithic microwave integrated circuit (MMIC) phase shifter and attenuator designs ensure repeatable performance and small size. A novel BFM integration approach is used which ensures state-of-the-art performance, low mass, and high reliability, as well as low-risk/low-cost assembly. ... View full abstract»

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  • Recent activities on millimeter wave indoor LAN system development in Japan

    Publication Year: 1995, Page(s):7 - 10
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (664 KB)

    The necessity for 60 GHz band development in Japan, the features of millimeter wave (MM-wave) indoor LAN, developments needed for its realization, and propagation studies to implement indoor LAN are reviewed. This paper describes a MM-wave minimum delay spread LAN under development in Japan, results of its propagation simulation, absorbable construction materials being considered for the system, a... View full abstract»

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