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Dielectric Waveguides Feed Millimeter-Wave Antennas

Jan. 23, 2008

FOR RECEIVER AND TRANSMITTER front ends in the millimeter-wave range to be widely used, certain problems must be resolved. An example is the connection of a miniature millimeterwave, monolithic integrated-circuit chip to an external antenna. To address this issue, Andreas Patrovsky and Ke Wu from the Poly-Grames Research Center at Ecole Polytechnique (Montreal, Quebec, Canada) developed a linear-array antenna fed by substrate integrated image guide (SIIG) at 94 GHz.

The resulting design provides a wide tuning range for the radiation coefficient and superior linear polarization purity. In addition, a reflection-compensation technique reduces the overall return loss while permitting frequency scanning through broadside direction without suffering from a stop band due to distributed Bragg reflection. The 2-cm-long implementation produced a fan beam with 11 dB of gain. See "Substrate Integrated Image Guide Array Antenna for the Upper Millimeter-Wave Spectrum," IEEE Transactions on Antennas and Propagation, Nov. 2007, p. 2994.

About the Author

Nancy Friedrich | RF Product Marketing Manager for Aerospace Defense, Keysight Technologies

Nancy Friedrich is RF Product Marketing Manager for Aerospace Defense at Keysight Technologies. Nancy Friedrich started a career in engineering media about two decades ago with a stint editing copy and writing news for Electronic Design. A few years later, she began writing full time as technology editor at Wireless Systems Design. In 2005, Nancy was named editor-in-chief of Microwaves & RF, a position she held (along with other positions as group content head) until 2018. Nancy then moved to a position at UBM, where she was editor-in-chief of Design News and content director for tradeshows including DesignCon, ESC, and the Smart Manufacturing shows.