Novatel Inc.

Polyvalor, Limited Partnership

Ning Yang

Christophe Caloz

Samer Abielmona

Jerry Allan Freestone

Van-Hoang Nguyen

Chad Gilbertson

A GNSS RHCP stacked patch antenna with wide dual band, high efficiency and small size is made of a molded high-permittivity material, such as ceramics, with a patterned cavity in the dielectric substrate. The perforated cavities in the substrate reduce the effective dielectric constant, increase the bandwidth and efficiency. The high-order modes can be manipulated through the design of cavities.

Stacked patch antennas using dielectric substrates with patterned cavities

A multiband microstrip antenna is provided. The antenna comprises of an inner ring radiator surrounded by an outer ring radiator on a first surface of a substrate. A feed network, on the second surface of the substrate, provides quadrature phases to feed posts to generate right hand circularly polarized (RHCP) signals.

Single-layer patch antenna

A patch antenna with wider bandwidth, better axial ratio over the angle and controlled radiation patterns is provided. A central fixed patch antenna is surrounded with reactively or resistively loaded peripheral monopoles as surface-wave excited parasitic radiators. The surrounding monopoles may be printed on the same substrate as the patch, and may take a spiral (pin-wheel) shape.

Patch antenna with peripheral parasitic monopole circular arrays

Antenna units, antenna systems and polarizing systems provide polarization diversity to leaky-wave antennas. An antenna unit comprises a rat-race coupler having a summation port, a difference port and two output ports. Each one of a pair of composite right/left-handed (CRLH) leaky-wave antennas (LWA) is connected at one end to a respective one of the output ports of the rat-race coupler. An inductive stub is implemented between the CRLH LWAs for connecting the CRLH LWAs to a grounded via. Various polarizations are obtained by injecting a radio-frequency (RF) signal in the summation or difference port of the rat-race coupler, or in both ports. System variants include various devices and assemblies for injecting RF signals in the antenna unit. One such variant includes a polarizing system having a switched matrix for directing a signal according to various intended polarizations.

Polarization-diverse antennas and systems

A system and method for a wide-band low loss quadrature phase antenna feed system is provided. A 180&#xb0; phase shifter is configured to generate a 0&#xb0; and 180&#xb0; phase output. The phase shifter's outputs are fed into a 90&#xb0; hybrid coupler to generate 0&#xb0;, 90&#xb0;, 180&#xb0; and 270&#xb0; outputs for used to feed a quadrature phase antenna.

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Calgary, Canada

Ning Yang