Abstract: An integrated compact antenna device and method of aiming an electromagnetic signal using the integrated compact antenna device are described. The integrated compact antenna device be a vertically mounted cylinder enclosing an antenna, some electronic circuitry and most of the directional alignment mechanism. During alignment, the cylinder of the ICA rotates to provide azimuth. The cylinder is attached to a fixed base that remains stationary relative to the mounting structure.

Abstract: A pressure switch element (1) including a semiconductor layer (3) having a diaphragm portion (5) in its center and a plate (2) having a through hole communicating with the exterior, which are stacked one on another so as to define a gas space (6) between the diaphragm portion of the semiconductor layer and the plate. The element (1) further includes an insulating layer (4) provided on the lower surface of the diaphragm portion (5), a first switch electrode (9) provided on the lower surface of the insulating layer (4), and a second switch electrode (10) behaving as a fixed electrode provided on the plate (2), such that chattering is prevented with a simple structure without using a complex electronic circuit.

Abstract: An miniaturized accelerometer having a narrow bandwidth and behaving as a switch sensitive only to low frequencies such as contained in earthquakes includes: a unbalanced see-saw beam assembly composed of beams 2 and masses 3 at opposite ends of the beams 2. The beams 2 have their suspension at a location with slightly different distances from the masses 3 along a line parallel to and vertically offset from the line connecting centers of gravity of the masses 3.