Abstract: This invention is directed towards a lightning prevention system that prevents lightning strikes by draining the ambient static charge before the electrical potential reaches the electrical breakdown point of the atmosphere. This invention suppresses the radiation of a secondary incoming radio wave (IRW) by reducing the electromagnetic interaction of an incoming IRW with components of this invention. To this end, this invention consists of a static charge dissipater and a grounding line. The static charge dissipater is a conductive tube that contains a large number of small diameter conductive wires that are partially inside the conductive tube. The single grounding line consists of an application appropriate length of small gauge wire. To prevent the radiation of a secondary IRW, ferrite beads are spaced equally along the grounding line at an application appropriate distance.

Abstract: A plurality of antennas attached to the glass of the rear window of a vehicle produces patterns that may be combined to give directional pick up patterns. The first basic antenna is two spaced vertical whip antennas connected by parallel horizontal delay lines. Each whip output has a cardioid pick up pattern in the direction of the other antenna, in this case to the right and left. The second antenna is connected vertically across the window opening. Its output has a figure eight pick up pattern, typical of a slot antenna, with the lobes to the front and rear of the vehicle. The phase relationship of these three pick up patterns are such that if properly combined, then either of two sets of pick up patterns can be obtained. The first pattern is the basic right and left cardioid, and the second pattern is the front and rear cardioids. When used in combination with a communications receiver and processor, the direction of the transmitter can be determined, regardless of which quadrant it lies.

Abstract: A Mobile Directional Comparator (MDC) used in combination with a communications receiver to process received signal information from a two port antenna system to drive a directional indicator. A radio frequency modulator modulates two received cardioid antenna signal patterns with two low frequency sine wave signals at a low modulation percentage and out of phase with each other. The two modulated cardioids are then combined in a hybrid circuit to produce a non-directional radio frequency signal pattern with respect to the antennae center axis. The combined modulated rf signal is carried through the receiver as a normal signal, and the intermediate frequency output of the receiver is processed by a phase demodulator in the MDC to extract from the signal phase and amplitude information to drive the directional indicator.