Abstract: The present disclosure relates to an expandable antenna for a security system that is installed within a wall. The security system may include a control unit. The control unit may include a casing that houses one or more internal components of the control unit and a radio-frequency (RF) communication module that is situated within the casing. The RF communication module includes an antenna connected that is exposed to the exterior of the casing. An expandable antenna connects to the antenna connector. The expandable antenna is fit through an aperture in a wall and is then expanded to an enlarged size within the gap of the wall.

Abstract: The present disclosure relates to an expandable antenna for a security system that is installed within a wall. The security system may include a control unit. The control unit may include a casing that houses one or more internal components of the control unit and a radio-frequency (RF) communication module that is situated within the casing. The RF communication module includes an antenna connected that is exposed to the exterior of the casing. An expandable antenna connects to the antenna connector. The expandable antenna is fit through an aperture in a wall and is then expanded to an enlarged size within the gap of the wall.

Abstract: Provided is a system and method for removing the effects of phase and amplitude distortions from data signals having at least a third order signal level in a North American Digital Signal Hierarchy. The reconstituted signals are directly modulated onto a radio frequency carrier signal using phase shit keying modulation techniques and then wirelessly transmitted via a transmitter. Further, the wirelessly transmitted reconstituted data signals are received by a corresponding receiver using a squaring loop carrier recovery operation.

Abstract: A wireless transmission system and method for supporting the full-duplex transmission of baseband data within a single RF band, is presented herein. The system includes a modem that modulates the baseband data with a spectrally efficient modulation technique. The system also includes a transceiver that accommodates the wireless transmission of data within a first sub-band of frequencies derived from the single RF band and the wireless reception of data within a second sub-band of frequencies derived from the single RF band. The system further includes combline band-pass filters and a dual orthogonal feed antenna to ensure the isolation and separation between the first and second sub-bands.