News and New Products

SAW duplexer cuts weight by shifting to plastic package

By Bill Schweber -- EDN, 9/8/2005

Every milligram counts in today’s portable-system world; new SAW duplexers from NDK (Nihon Dempa Kogyo) make this point by switching from ceramic to plastic packages and cutting weight by 40 to 50%. The WX807C, for US CDMA application, has a nominal transmitter-band center frequency of 836.5 MHz and a receiver-band frequency of 881.5 MHz. The similar WX910A for UMTS applications has transmitter and receiver frequencies of 1950 and 2140 MHz, respectively.

Maximum insertion loss for these duplexers is just 2 dB in the transmitting path and 2.8 dB in the receiving path, with attenuation of 43 dB and 55 dB, respectively. The 50Ω duplexers measure 3.8 mm sq and 1.5 mm high. The CDMA WX807C sells for $1.15, and the UMTS WX910A sells for $1.62 (10,000).

NDK America, www.ndk.com.