Resources Contact Us Home
Non-linear junction detector

Image Number 5 for United States Patent #6057765.

A non-linear junction detector designed for counter surveillance measures achieves superior performance by using a single circularly polarized antenna to transmit a signal and to receive harmonics of the transmitted signal that are re-radiated by a non-linear junction such as would be found in a eavesdropping device containing a semiconductor. The antenna is mounted on a telescoping antenna extension assembly. A single electrically conductive cable is contained inside the antenna and connects the antenna to the transceiver case which houses the non-linear junction detector electronics. A cable winder is built into the antenna and is employed to provide automatic dispensing and retraction of the cable when the antenna extension assembly is extended or retracted. A display is built into the antenna head assembly to provide signal strength indications and operational information concerning the functioning of the non-linear junction detector to the user of the device. The control signals and power for the display are multiplexed onto the single electrically conductive cable.

  Recently Added Patents
Prevention and reduction of blood loss
Printing apparatus
SRAM cells using shared gate electrode configuration
Factor IXa crystals, related complexes and methods
Approaching object detection system
Mobile terminal and method for displaying information
Mode detection for DVB receiver
  Randomly Featured Patents
Apparatus and method for polishing workpiece
Intermittent indexing apparatus using cam mechanism
Process for flocculation using crosslinked polysulfonium compounds
Vehicle seating system and cabin
Intercepting a communication session in a telecommunication network
Jet stack brazing in a diffusion furnace
Locking clamp assembly
Heterocyclic acetylenic amines having central nervous system activity
Capacitor and a manufacturing process therefor
High speed flywheel