Abstract: A multilayer antenna including a first microstrip patch positioned along a first plane, a second microstrip patch positioned along a second plane that is substantially parallel to the first plane, and a ground plane having a slot formed therein. The multilayer antenna also includes a microstrip feeding line for propagating signals through the slot in the ground plane and to the second microstrip patch and a backlobe suppression reflector for receiving some of the signals and reflecting the signals to the slot in the ground plane.

Abstract: An antenna with improved radiation efficiency is provided. The antenna includes an antenna array proximately coupled to a feed line. The antenna array includes a plurality of resonating lines. Each resonating line includes a plurality of axially aligned resonators. The resonators have a resonating surface. The resonating surfaces of the resonators at the ends of the resonating lines are larger than resonating surfaces of the resonators in the middle of the resonating lines. Power is supplied to each resonating ling through a feed line. Electrical field is uniformly distributed along the antenna array so as to improve the radiation efficiency of the antenna.

Abstract: An apparatus for reducing crosstalk including a substrate having a bottom surface and a top surface defining a horizontal plane, a ground plane coupled to the bottom surface of the substrate, first and second microstrip lines formed on the top surface of the substrate, the first and second microstrip lines formed on the top surface of the substrate and spaced apart from one another, and a first plurality of vias traveling through the substrate from the top surface of the substrate to the ground plane and positioned between the first and second microstrip lines for reducing crosstalk between the first and second microstrip lines.

Abstract: A microwave antenna having an electrically nonconductive substrate with a top and bottom side. A radiator array having a plurality of rows of radiator patches is disposed on the top side of the substrate while an input feed line and power divider network are disposed on the bottom side of the substrate. The power divider network includes a plurality of ends wherein each end is adapted for electrical connection through a via formed through the substrate to the end of its associated row in the radiator array. An electrically conductive layer is disposed over a portion of the top side of the substrate so that the electrically conductive layer overlies the power divider network and shields the power divider network from the radiator array.

Abstract: An antenna with improved radiation efficiency is provided. The antenna includes an antenna array proximately coupled to a feed line. The antenna array includes a plurality of resonating lines. Each resonating line includes a plurality of axially aligned resonators. The resonators have a resonating surface. The resonating surfaces of the resonators at the ends of the resonating lines are larger than resonating surfaces of the resonators in the middle of the resonating lines. Power is supplied to each resonating ling through a feed line. Electrical field is uniformly distributed along the antenna array so as to improve the radiation efficiency of the antenna.

Abstract: A multilayer antenna including a first microstrip patch positioned along a first plane, a second microstrip patch positioned along a second plane that is substantially parallel to the first plane, and a ground plane having a slot formed therein. The multilayer antenna also includes a microstrip feeding line for propagating signals through the slot in the ground plane and to the second microstrip patch and a backlobe suppression reflector for receiving some of the signals and reflecting the signals to the slot in the ground plane.

Abstract: A microwave antenna having an electrically nonconductive substrate with a top and bottom side. A radiator array having a plurality of rows of radiator patches is disposed on the top side of the substrate while an input feed line and power divider network are disposed on the bottom side of the substrate. The power divider network includes a plurality of ends wherein each end is adapted for electrical connection through a via formed through the substrate to the end of its associated row in the radiator array. An electrically conductive layer is disposed over a portion of the top side of the substrate so that the electrically conductive layer overlies the power divider network and shields the power divider network from the radiator array.

Abstract: An apparatus including a liquid crystal polymer substrate having a top surface and a bottom surface, a coplanar waveguide formed on the top surface of the liquid crystal polymer substrate, the coplanar waveguide having a 90 degree bend with a mitered edge, an inner via positioned adjacent to an inner corner of the 90 degree bend, and an outer via positioned adjacent to the mitered edge of the 90 degree bend, the inner and outer vias positioned along a first plane that is perpendicular to a second plane defined by the mitered edge.

Abstract: An apparatus for reducing crosstalk including a substrate having a bottom surface and a top surface defining a horizontal plane, a ground plane coupled to the bottom surface of the substrate, first and second microstrip lines formed on the top surface of the substrate, the first and second microstrip lines formed on the top surface of the substrate and spaced apart from one another, and a first plurality of vias traveling through the substrate from the top surface of the substrate to the ground plane and positioned between the first and second microstrip lines for reducing crosstalk between the first and second microstrip lines.

Abstract: An apparatus including a liquid crystal polymer substrate having a top surface and a bottom surface, a coplanar waveguide formed on the top surface of the liquid crystal polymer substrate, the coplanar waveguide having a 90 degree bend with a mitered edge, an inner via positioned adjacent to an inner corner of the 90 degree bend, and an outer via positioned adjacent to the mitered edge of the 90 degree bend, the inner and outer vias positioned along a first plane that is perpendicular to a second plane defined by the mitered edge.

Abstract: Apparatus and methods according to examples of the present invention include providing an electrical interconnection between an RF circuit and an antenna, the electrical interconnection including a transition via through an antenna substrate. The electrical connection can be configured so as to provide low losses.