A Novel Differential Microstrip Patch Antenna and Array at 79 GHz
Sprache des Titels:
Proc. International Symposium of Antennas and Propagation
A novel differential microstrip patch antenna (DMPA) is designed for autonomous cruise control
radar systems at 79 GHz. Distinct from conventional single-ended patch antennas, the DMPA uses a pair
of coupled lines as feeding line. It eliminates the need of a balun in the RF frontend and supports the
realization of more compact radar frontend. First, a single DMPA is designed. The impedance bandwidth
reaches 4.7 GHz and the gain at 79 GHz is 6.2 dBi. Simulations show that the length of the patch
determines the resonance frequency and the gap between the feed points affects the patch impedance.
Furthermore, a four-element series-fed array is presented with 4.6 GHz bandwidth and 12.8 dBi gain.
Both the single DMPA and the four-element DMPA array were fabricated and measured. Measurement
results show good agreement with simulation results.