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| Number | Title | Issue Date |
| 7176691 | Switched coil receiver antenna for metal detector A pulse induction metal detector includes a pulse transmitter coil for generating and transmitting a first electromagnetic signal and a receiver coil for detecting and amplifying a second electromagnetic signal emitted by a nearby metal target due to eddy currents g... | 02/13/2007 |
| 7113134 | Transformer antenna device and method of using the same The invention contemplates an antenna device, system and method of installing the antenna device for receiving a wireless signal at a pad mounted electrical transformer. The novel device includes an antenna capable of communicating the wireless signal and a material... | 09/26/2006 |
| 6914556 | Method and apparatus for magnetron coherence A pulsed magnetron is caused to emit a series of RF energy pulses which are phase coherent with an injection signal by supplying the magnetron with a pedestal pulse during low-power signal injection. The pedestal being of a magnitude and duration such that the slow-... | 07/05/2005 |
| 5170414 | Adjustable output level signal transmitter An adjustable output level transmitter includes a direct current energy source, an L-C tank circuit and a switching means for sequentially coupling the capacitors of the tank circuit to the direct current energy source and ground. The output signal freque... | 12/08/1992 |
| 4217468 | Spiral line oscillator A compact lightweight high power RF generator for use in military systems combines the principles of vector inversion transform systems with a RF tank circuit. The capacitively stored energy in the lines is discharged by means of high speed switching tech... | 08/12/1980 |
| 4193032 | High speed transmitter pulser An apparatus for pulsing a high speed transmitter having pulser delay times in the nanosecond range. The combination of solid state and spark gap devices provide protection against high voltage arcs for both transient and power follow-through conditions.... | 03/11/1980 |
| 4160210 | Printed circuit impedance transformation network with an integral spark gap A printed circuit board including a serpentine conductor formed thereon is mounted on a grounded metal chasis of the receiver's tuner so that the serpentine conductor and the grounded chassis form a transmission line for matching the impedances of the rec... | 07/03/1979 |
| 4070636 | Plural loop spark gap RF pulse radiation converter The high-power, short-pulse array is a self-contained radiating oscillator system which radiates a high peak-power pulse of radio frequency energy. The radiated pulses contain only a few cycles of RF and hence it is a short-pulse emitter. The device conta... | 01/24/1978 |
