Abstract: A horizontal polarized wave non-directional array antenna, including: an antenna supporting member supported so that an axial direction thereof corresponds to a vertical direction, the antenna supporting member including a pair of feeder lines that are disposed parallel to each other in the axial direction, the antenna supporting member having abase portion; a plurality of dipole antennas arrayed along and connected to the pair of feeder lines; and a balance/unbalance converting portion formed on a feeding side of the base portion for feeding the pair of feeder lines in series.

Abstract: A planar antenna device comprises a ground plane, a planar antenna element having a principal plane mounted above the ground plane, and a cavity, having an opening partially exposing the antenna element, placed on the ground plane in order to cover the entire antenna element contactlessly.

Abstract: A planar antenna device comprises a ground plane, a planar antenna element having a principal plane mounted above the ground plane, and a cavity, having an opening partially exposing the antenna element, placed on the ground plane in order to cover the entire antenna element contactlessly.

Abstract: A planar array antenna includes a ground plate formed of metallic material, a plurality of patch antenna elements supported on the ground plate by insulation spacers, respectively, and arrayed at a predetermined pitch, and a feed line for coupling adjacent antenna elements of the plurality of patch antenna elements.

Abstract: [Object] To provide a method of manufacturing a helical antenna for satellite communications which has no local bent, etc. in the completed helical coil even though the conductor wire used is of an extremely pliable material, so that a high-quality helical antenna for use in satellite communications is obtained.[Structure] A winding frame 10 in which supporting elements 12 are projected in the form of a cross from the outer circumferential surface of a rod-form base 11 is first obtained. Wedge members 71 through 74, each of which having a configuration of a cylindrical body divided into four sections along its axis, are installed between the supporting elements 12. Then, with the cylindrical surfaces of the wedge members 71 through 74 being used as a winding guide, a conductor wire is wound in helical form through conductor wire installation grooves 13 formed on the edges of the supporting elements 12. Thus, a helical coil 20 is formed.

Abstract: A capacitive antenna coupling circuit including a counter electrode which is connected to one end of at least one meandering conductor and a peripheral conductor connected to the other end of the meandering conductor which forms a capacitor between itself and the counter electrode.

Abstract: An automobile mast antenna used in a state shorter than its resonant state including an FM compensating circuit made only of passive elements and compensating for FM signals and an AM compensating circuit made of active elements that convert high impedance into low impedance and compensating for AM signals. The FM compensating circuit is formed with a primary resonance circuit and a secondary resonance circuit, in which the primary resonance circuit resonates in FM band via impedance of an antenna mast and loading coil which is attached to the antenna mast, and the secondary resonance circuit resonates in FM band via a coil and capacitor. The primary and secondary resonance circuits are coupled by electrostatic capacitance of attachment section of the antenna mast so as to form a double-tuned circuit.

Abstract: A glass mounted antenna for car radio including an antenna element having a length that is in a resonant or non-resonant state with respect to FM frequencies, resonance circuits made up with spiral coils and capacitors so as to resonate in the FM band, a band-pass filter that passes only FM signals and no AM signals, and an AM impedance converter having an active element converting high-impedance signals into low impedance signals.