Abstract: A diversified planar phased array antenna includes a dielectric plate, at least two antenna units, at least one first micro-strip line and a ground layer. Two antenna units formed on the dielectric are coplanar and are connected perpendicular together by the first micro-strip line to form one with vertical field polarization and one with horizontal polarization. Each antenna unit is composed of at least two identical meander line antennas which have unique dual linear polarization property and at least one second micro-strip line connected to the at least two meander line antennas. The first micro-strip line is connected to at least two second micro-strip lines of the two antenna units. Therefore, the planar phased array antenna meets the requirements for spatial diversity, polarization diversity, radiation diversity and frequency diversity, etc. Each antenna unit can be formed by different number of meander line antennas which is determined to be the best for a specific application.

Abstract: A diversified planar phased array antenna includes a dielectric plate, at least two antenna units, at least one first micro-strip line and a ground layer. Two antenna units formed on the dielectric are coplanar and are connected perpendicular together by the first micro-strip line to form one with vertical field polarization and one with horizontal polarization. Each antenna unit is composed of two symmetrical meander line antennas and a second micro-strip line connecting the two meander lines. The first micro-strip line is connected to two second micro-strip lines of the two antenna units. Therefore, the planar phased array antenna meets the requirements for spatial diversity, polarization diversity, radiation diversity and frequency diversity, etc.

Abstract: An improved printed-circuit cross-slotted antenna for satellite communication. The antenna comprises a dielectric substrate covered with conductive material on a first ground plane side and on a second radiating side. The periphery edges of the first and second sides electrically interconnect the sides. The radiating side includes a first and a second slot with the conductive material removed and the substrate exposed. Conductors pass through the crossed slot antenna from the first side to the second side with connections only to the second side. Electrical signals to be radiated from the second side are connected to the connectors. The second side radiates the Electrical signals in a pattern according to the configuration of the slots.

Abstract: A flat planar antenna formed from a flat this substrate coated on one surface with a electrically conductive material except for a first uncoated funnel shaped cavity with a large mouth beginning along one outer surface of the substrate and diminishing in cross-section toward the center of the substrate with a diminishing width down to an extended neck portion which extends to an outer substrate surface normal or parallel to the substrate surface adjacent to the mouth. A smaller tuning cavity may be positioned over the neck portion adjacent to the edge of the substrate. The antenna may have feed lines plated on the opposite surface from the funnel shaped cavity, hard wired through the substrate to the opposite side thereof or formed by micro stripline techniques. A second embodiment employs unplated side cavities between the funnel unplated area and the edges of the substrate normal to the funnel mouth.

Abstract: A printed circuit cavity-backed crossed-slotted conductive element having two legs of each slot coupled by stripline feeders to a radio communications device. The feeders supply the radio frequency signal with a 180 degree phase shift in order to cancel cross-coupling from one leg to another around the intersection. The conductive element and the stripline feeders are mounted on separate substrates which are attached together with other elements to provide shielding and mechanical protection. The crossed-slot design reduces space and structure required for a mobile application while achieving good performance. When mounted in an array, the crossed slot antennas may be directionally tuned to a specific satellite/frequency/direction via pin diode phase shifters.

Abstract: A compact, lightweight, wideband, wing-conformal phased-array antenna structure, the array elements of which are identical, log-periodic arrangements of electrically small, folded-monopole elements printed on both sides of a dielectric substrate. A significant reduction in the height of the array elements makes this array configuration feasible for many airborne applications.