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ABSTRACT: A partly integrated phase-locked loop (PLL) accompanied by a 60 GHz IQ-transmitter and IQ-receiver is presented in this paper. The chip has been designed to support wireless data communication applications as well as radar applications for level sensing or moving-target-indication (MTI) in the ISM band. This contribution focuses on the implementation of the PLL, furthermore it shows a CW-radar-measurement scenario using an RF demonstrator.
Microwave Symposium Digest (MTT), 2011 IEEE MTT-S International; 07/2011
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ABSTRACT: This contribution describes the realization of a heterodyne frequency-modulated continuous-wave (FMCW) radar system operating in the frequency band from 76 GHz to 77 GHz. To implement the heterodyne principle two voltage controlled oscillators (VCOs) are operated in order to produce frequency ramp signals with a fixed frequency offset. This allows to mitigate effects occurring in homodyne systems like, e.g., DC-offsets or low-frequency noise components. To avoid large divider values in the control loop the presented system is based on an offset phase-locked-loop configuration. In the presented implementation the same downconverter is used to implement the offset-loop for both VCOs, which has the positive effect that errors and noise influences in the downconversion process-at least partly-cancel out in the final FMCW output signal.
Wireless Sensors and Sensor Networks (WiSNet), 2011 IEEE Topical Conference on; 02/2011
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ABSTRACT: For 77-GHz automotive radar applications, a monolithic frequency multiplier with a multiplication factor of 18 is presented. The main circuit of the multiplier chain consists of two frequency tripler and one doubler. Additionally interstage amplifiers and filters are integrated in a 200-GHz SiGe:C production technology. The output power is -1dBm for a wide input power range (-20dBm - +8 dBm) at room temperature and 76.5 GHz output frequency. The output power flatness is better than 2 dB for an output frequency range of 69 GHz to 80 GHz. The power consumption of the multiplier is 170mW at a single supply voltage of 3.3V.
Bipolar/BiCMOS Circuits and Technology Meeting (BCTM), 2010 IEEE; 11/2010
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ABSTRACT: A novel radar frontend for 77 GHz mid-range-radar (MRR) and short-range-radar (SRR) applications is presented. The radar sensor makes use of a Colpitts oscillator, frequency multipliers, and a transceive (TRX) mixer. A single sensor contains up to four channels using antenna arrays for angular detection relative to the sensor. The characterization of the integrated circuit's parameters has been carried out using a two-channel sensor with waveguide (WG) transitions. A radar measurement scenario has been realized using a four-channel sensor with a differential antenna array. All sensors have been implemented on off-the-shelf printed circuit board (PCB) substrate.
Silicon Monolithic Integrated Circuits in RF Systems (SiRF), 2010 Topical Meeting on; 02/2010
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ABSTRACT: Frequency quadruplers for an integrated 77 GHz subharmonically pumped automotive radar transceiver in SiGe are presented. The fully differential circuits are integrated in a 200 GHz SiGe:C production technology and operate at a supply voltage of 3.3 V. Two different multiplier concepts are introduced and evaluated. The individual multipliers are combined with a radar transceiver circuit and the receive mixer performance is demonstrated. The 77 GHz radar transceiver is pumped with a 19 GHz LO signal, which is quadrupled and amplified to drive a power amplifier and the switching transistors of a Gilbert-type mixer.
Microwave Integrated Circuits Conference, 2009. EuMIC 2009. European; 10/2009
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ABSTRACT: A down-converter including a voltage controlled oscillator (VCO), buffer, mixer, and prescaler is presented. The fully differential circuit configuration of the down-converter operates in a frequency range from 17.7 GHz to 19.4 GHz at a 5.5 V supply. The overall current consumption at room-temperature is 186 mA. The VCO has been improved in terms of area consumption and phase noise.
Bipolar/BiCMOS Circuits and Technology Meeting, 2008. BCTM 2008. IEEE; 11/2008
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H.P. Forstner,
H. Knapp,
H. Jager,
E. Kolmhofer,
J. Platz, F. Starzer,
M. Treml,
A. Schinko,
G. Birschkus,
J. Bock, [......],
R. Lachner,
T. Meister,
H. Schafer,
D. Lukashevich,
S. Boguth,
A. Fischer,
F. Reininger,
L. Maurer,
J. Minichshofer,
D. Steinbuch
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ABSTRACT: A fully integrated 4-channel automotive radar transceiver chip, integrated in a 200-GHz SiGe:C production technology, is presented. With a typical transmit power of 2 x +7 dBm at the antenna ports and all functions active, the chip draws a current of about 600 mA from a single 5.5 V supply. The design permits FMCW operation in the 76 to 77 GHz band at chip-backside temperatures from -40degC to +125degC.
Radio Frequency Integrated Circuits Symposium, 2008. RFIC 2008. IEEE;
