Motorola Corporation

Tyco Fire + Security Gmbh

Motorola Solutions, Inc.

Roni Shamsian

Alexander Shapira

Ilan Yehezkel Horowitz

Max Drankovsky

Mark Rozental

Moshe Ben-Ayun

Gabriel Bitton

Moshe Ben Ayun

Ariel Luzzatto

David Moallem

Assaf Oren

Nachman Grabsky

A door/window opening detector including an antenna having at least a first resonant frequency and a second resonant frequency associated therewith, the second resonant frequency being different from the first resonant frequency, the antenna having the first resonant frequency when in proximity to a door/window having a given dielectric constant and the second resonant frequency when not in proximity to a door/window having the given dielectric constant, and an alarm indication generator operable, in response to receiving an indication that a resonant frequency of the antenna has changed from the first resonant frequency to the second resonant frequency, for generating an alarm indication of opening of the door/window.

Single-element door/window opening detector

An antenna arrangement () and communication device () using the antenna arrangement connect a plurality of transceivers () to a plurality of antenna elements () and switches connections between the transceivers and the antenna elements depending on which transceiver has primary transmit control. The antenna elements include a transmit antenna element () and a monitoring antenna element (). The transceiver having primary transmit control is connected to the transmit antenna element and the transceiver not having primary transmit control is connected to the monitoring antenna element.

Antenna arrangement and mobile communication device using same

A radio is described having a synthesizer (17) and a VCO (18). Each of the synthesizer and the VCO has a connection to a ground plane (13) of the radio. The ground plane connection of the VCO has a first capacitor (43) and a further ground connection (40) is provided between the VCO and the synthesizer for providing a common baseband ground for the VCO and the synthesizer, isolated with respect to baseband frequency currents in the ground plane of the radio. The arrangement addresses problems arising in radios having power amplifiers with severe output amplifier variations, such as are found in linear radios.

Radio with synthesizer and VCO

Radio transmitter with power amplifier linearizer

Growing community of inventors

Holon, Israel

Roni Shamsian