Low loss surface acoustic wave (SAW) filters have been developed for use in the radio frequency circuits of the mobile telephone transceiver. Both the UHF (800 MHz) and VHF (90 MHz) band-pass filters ...

In this paper, the design, construction and characterization of closed-loop, dual-mode resonator band-pass filters operating at a center frequency of 1.1 GHz, using a low-cost FR4 substrate, is ...

Different types of communication—like FM radio, TV, mobile phones, and ham radio—use different ranges (or bands) of radio frequencies to avoid interfering with each other. Here’s a explanation of the ...

This device combines a Palm OS 5 PDA with a dual-band CDMA phone and a VGA camera, in a sleek new form factor. Additional key features include a QWERTY mini-keyboard, SDIO expansion slot, and ...

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