Active GNSS Antenna Implemented with Two-Stage LNA on High Permittivity Substrate

作者：Go Jong-Gyu; Chung Jae-Young^*

来源：Journal of Electrical Engineering and Technology, 2018, 13(5): 2004-2010.

DOI：10.5370/JEET.2018.13.5.2004

• Active antenna
• Axial ratio
• Circularly polarization
• Global navigation satellite system
• Patch antenna

( )We propose a small active antenna to receive Global Navigation Satellite System (GNSS) signals, i.e., Global Positioning System (GPS) L1 (1,575MHz) and Russian Global Navigation Satellite System (GLONASS) Ll (1,600 MHz) signals. A two-stage low-noise amplifier (LNA) with more than 27 dB gain is implemented in the bottom layer of a three-layer antenna package. In addition, a hybrid coupler is used to combine signals from pair of proximately coupled orthogonal feeds with 90 degrees phase difference to achieve the circular polarization (CP) characteristic. Three layers of high permittivity (epsilon(r) = 10) substrates are stacked and effectively integrated to have a small dimension of 64 mmx64 mmx7.42 mm (including both circuit and antenna). The reflection coefficient of the fabricated antenna at the target frequency is below -10 dB, the measured antenna gain is above 26 dBic and the measured noise figure is less than 1.4 dB.

• 出版日期2018-9