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We introduce a class of deterministic push-down transducers called concatenation state machine (CSM) and we study its semantic domain which is a class of parial mappings over finitely generated free monoids, called simple functions.
The design of a complex integrated transceiver for 121-124 GHz is presented. The transceiver consists of the transmitter with VCO, power amplifier and power detectors, the receiver with LNA, two mixers for quadrature receive path and variable gain amplifiers for IF-output and the digital control circuits with SPI-interface. A central part is the VCO with… (More)
Millimeter-Wave (MMW) frequencies offer large bandwidths for communication, radar and imaging. Moreover, antennas can be realized in small dimensions, resulting in miniaturized transceiver systems. In such systems, the cost is a big obstacle limiting their mass application. Analog MMW-transceiver chipsets have been demonstrated in [1-3], where the cost is… (More)
A 245 GHz transmitter (TX) array with an integrated antenna-array for a gas spectroscopy system has been realized, which consists of a push-push VCO with a 1/64 frequency divider, power amplifiers, frequency doublers, and on-chip antennas with localized backside etching. The TX-frequency is tunable in the range from 238 GHz to 252 GHz. The TX-array is… (More)
A subharmonic receiver (RX) for sensing applications in the 245 GHz ISM band is presented. The RX consists of a differential LNA, a 122 GHz push-push VCO with 1/64 divider, a LO-buffer, a 90° differential hybrid, an active subharmonic mixer, and an on-chip antenna. The VCO frequency is tunable by an external PLL in the range from 118 GHz to 125 GHz.… (More)
Open Skies Treaty /OS/ is one of a few international agreements giving base to a created cooperative security system. Each member country has the right to conduct a mission over the other countries and take airborne photos of selected objects. The main requirements of the Treaty concern the max resolving power that may be achieved by means of photographic… (More)
Multispectral video system developed by the Authors in real time is presented in the paper. The system enables to acquire precise information about the objects and theirs location, and when combined with a communication system it enables quick transmission of the information in the form of image, text description and navigational data to Ground Station. The… (More)
The measurement results as well as the theoretical background are presented. The chips were fabricated in a 0.35 µm BiCMOS-technology and operate at a supply voltage of 2.7 V.
240 GHz transmitter and receiver ICs for a 3D imaging system operating are presented. The transmitter exhibits 0.75 dBm output power at 220 GHz, and features a bandwidth of more than 60 GHz while consuming 55 mA from 3 V supply. The receiver features 14 dB of conversion gain at 220 GHz while consuming 81 mA from a 3 V supply. The circuits were implemented… (More)