Abstract: A multiple function radio bezel interface includes a display screen, a first knob assembly including an outer ring and an inner knob, the outer ring adapted to allow a user to select an application from a multimedia main menu and the inner knob adapted to allow a user to selectively power the radio bezel interface and to adjust the volume of the radio, and a second knob assembly including an outer ring and an inner knob, the outer ring adapted to allow a user to select different application screens corresponding to the application selected from the multimedia main menu and the inner knob being a jog controller.

Abstract: The present invention provides a radio system for portable use. The radio system includes a radio tuner, a display, and a touch pad. The radio tuner is configured to receive radio transmissions. The display is in communication with the radio tuner to display transmission information, radio commands, or input from the touch pad. The touch pad is configured to sense gestures on the surface of the touch pad. Further, the radio tuner is capable of executing radio control commands in response to each of the gestures.

Abstract: A novel programmable SAW filter with switchable multi-element interdigital transducers (IDTs) controlled by a microprocessor or a computer is provided that realizes the tunability of both center frequency and bandwidth of the SAW filter. The filter possesses the feature of the programmability of both center frequency and 3 dB bandwidth. As an example design, the center frequency of the SAW filter ranges from 126.8 MHz to 199.1 MHz while the 3 dB bandwidth ranges from 18.8 MHz to 58.9 MHz. The multi-input configuration increases the programmability of the device and improves insertion loss. A matching network for the programmable SAW filter further improves insertion loss level and stopband attenuation. A resistance weighting method has been applied to improve in band ripple with the passband ripple being reduced from 6.44 dB to 1.37 dB after resistance weighting.

Abstract: A novel programmable SAW filter with switchable multi-element interdigital transducers (IDTs) controlled by a microprocessor or a computer is provided that realizes the tunability of both center frequency and bandwidth of the SAW filter. The filter possesses the feature of the programmability of both center frequency and 3 dB bandwidth. As an example design, the center frequency of the SAW filter ranges from 126.8 MHz to 199.1 MHz while the 3 dB bandwidth ranges from 18.8 MHz to 58.9 MHz. The multi-input configuration increases the programmability of the device and improves insertion loss. A matching network for the programmable SAW filter further improves insertion loss level and stopband attenuation. A resistance weighting method has been applied to improve in band ripple with the passband ripple being reduced from 6.44 dB to 1.37 dB after resistance weighting.