Benjamin Göttel

An Integrated 122-GHz Antenna Array With Wire Bond Compensation for SMT Radar Sensors

This paper shows the antenna design of an integrated 122-GHz radar sensor. The sensor consists of a SiGe IC with a complete radar circuit and two antennas for transmitting and receiving the 122-GHz signal. The IC and the antennas are integrated into a low-cost plastic package that is assembled using wire bond technology. The antenna design was specifically optimized regarding the integration into the package and the compensation of the parasitic effects of the wire bond interconnect. First, the antenna design and its novel feeding technique based on a GCPW transmission line are explained. Then, measurement results including the wire bond interconnect are presented. Finally, details of the complete radar sensor are given.

SiGe Process Integrated On-Chip Dipole Antenna on Finite-Size Ground Plane

This letter investigates the effect of a finite-size ground plane on the radiation pattern and reflection coefficient of a SiGe process integrated on-chip antenna. A flat 77-GHz on-chip strip dipole antenna integrated with a lumped LC balun circuit is designed and implemented. For increased directivity, the etched silicon substrate is placed on a metal ground plate. The on-chip antenna with the LC balun circuit is connected to GSG pads for measurement purposes. The antenna is well matched at the original resonance frequency band with 7-12 GHz impedance bandwidth and 4 dBi measured gain at 85 GHz.

Miniaturized Millimeter-Wave Radar Sensor for High-Accuracy Applications

A highly miniaturized and commercially available millimeter wave (mmw) radar sensor working in the frequency range between 121 and 127 GHz is presented in this paper. It can be used for distance measurements with an accuracy in the single-digit micrometer range. The sensor is based on the frequency modulated continuous wave (CW) radar principle; however, CW measurements are also possible due to its versatile design. An overview of the existing mmw radar sensors is given and the integrated radar sensor is shown in detail. The radio frequency part of the radar, which is implemented in SiGe technology, is described followed by the packaging concept. The radar circuitry on chip as well as the external antennas is completely integrated into an 8 mm

Millimeter-Wave Radar Sensor for Snow Height Measurements

\times \,\, 8

Off-chip antenna designs for fully integrated, low-cost millimeter-wave transceivers

mm quad flat no leads package that is mounted on a low-cost baseband board. The packaging concept and the complete baseband hardware are explained in detail. A two-step approach is used for the radar signal evaluation: a coarse determination of the target position by the evaluation of the beat frequency combined with an additional determination of the phase of the signal. This leads to an accuracy within a single-digit micrometer range. The measurement results prove that an accuracy of better than

Ultra broadband millimeter-wave antenna fabricated on flexible substrate

\pm 6~\mu \text{m}

A 122 GHz four element patch array fed by electromagnetic coupling

can be achieved with the sensor over a measurement distance of 35 mm.

Novel TM0 surface wave launcher for integrated planar leaky wave antennas

A small and lightweight frequency-modulated continuous-wave (FMCW) radar system is used for the determination of snow height by measuring the distance to the snow surface from a platform. The measurements have been performed at the Centre des Études de la Neige (Col de Porte), which is located near Grenoble in the French Alps. It is shown that the FMCW radar at millimeter-wave frequencies is an extremely promising approach for distance measurements to snow surfaces, e.g., in the mountains or in an Arctic environment. The characteristics of the radar sensor are described in detail. The relevant accuracy to measure the distance to a snow layer is shown at different heights and over an extended time duration. A dedicated laser snow telemeter is used as reference. In addition, the reflection from different types of snow is shown.

Pea-Sized mmW Transceivers: QFN-?Based Packaging Concepts for Millimeter-Wave Transceivers

This paper presents two specific antennas that can be integrated into a chip package. Both are optimized to be connectable to a single chip radar transceiver. Thus a fully integrated, surface-mountable and low-cost radar sensor results. The first antenna design is a double dipole antenna for a frequency range from 108 GHz to 129 GHz that can be connected to the MMIC using flip chip technology. The second antenna is a four element patch array with a series-parallel feed network and a bandwidth from 143 GHz to 154 GHz. It can be placed beside a MMIC and connected to it using wire bond technology. Details of both antennas are shortly explained. Afterwards measurement results are given.

Novel planar electromagnetic bandgap for mutual coupling reduction between patch antennas

This paper investigates an ultra broadband planar antenna which is appilcable in D-band systems. The proposed design allows the fabrication of the antenna on a 25μm thin flexible polyimide based substrate which is machined by standard thick film processes. The relative bandwidth of the antenna is about 36 %, a high gain from 7 to 11 dB is achieved in the frequency range from 110 - 170 GHz. The constant broadside radiation patterns are presented by measurement results and are finally compared to the simulation.