Active antenna using multi-layer ceramic-polyimide substrates for wireless communication systems

摘要

This paper proposes an active antenna structure for high-speed wireless communication systems that is constructed with the multi-layer ceramic and polyimide substrates. Additionally, this antenna has the transmitted/ received amplifier and the time division duplex switch circuits that are mounted on the MMIC chip and the low-pass filter circuit. A prototype active antenna at 25-GHz is manufactured and it is realized that the measured total gain of both transmitting and receiving is more than 21dBi which directional gain is about 11dBi. Additionally, we confirm that the C/N ratio is improved about 2.7dB compared with the same design passive antenna.