![[IEEE 2009 Asia Pacific Microwave Conference - (APMC 2009) - Singapore, Singapore (2009.12.7-2009.12.10)] 2009 Asia Pacific Microwave Conference - An annular microstrip antenna with sectoral slots for RFID reader]()
[IEEE 2009 Asia Pacific Microwave Conference - (APMC 2009) - Singapore, Singapore (2009.12.7-2009.12.10)] 2009 Asia Pacific Microwave Conference - An annular microstrip antenna with sectoral slots for RFID readerSuwalak, Rattapong; Pongpaibool, Pornanong; Phongcharoenpanich, Chuwong; Krairiksh, Monai · 2009