Dfine and Telnova are professional design and manufacture company in China, which focus on RF / microwave / MMW components for cellular telecommunication, Passive components include filter, diplexer / duplexer, power divider, combiner, coupler, while active components include power amplifier, transceiver, frequency selector components.The Topo structure of most of the passive components are cavity. For filters, there are band pass filters, band reject filters, low pass filters, high pass filters, harmonic filters, monoblock filters, wideband filters（wide-band filters）, narrow band filters(narrow-band filters). Also, many kind of couplers are available, such as directional coupler, hybrid coupler (hybrid-coupler), 3dB coupler, 90°couplers. We can also offer many kind of power dividers(power splitter) : 2 ways power divider, 3 ways power dividers, 4 ways power dividers, 8 ways power divider, 12 ways power dividers, 16 ways power dividers. Diplexers / duplexers, triplexers, quadplexers can be used in GSM, CDMA, WCDMA, CDMA2000, TD-SCDMA cellular network. Combiners can combiner the any signals from GSM, CDMA, WCDMA, CDMA2000, TD-SCDMA, WiMAX, etc. Transceivers ( including transmitter or receiver individuals.) PA series products include power amplifiers (power amp), LNA(low noise amplifier), pre-amplifier, etc.