City University of Hong Kong

Freescale Semiconductor,inc.

Kwai Man Luk

Chi Hou Chan

Hau Wah Lai

Hang Wong

Ka Ming Mak

Quan Xue

Kwok Kan So

Chi Lun Mak

Ka Leung Lau

Yung Chow

Jingtao Zeng

Yanhong Xu

Ao Li

The present invention provides a new wideband mm-wave end-fire magneto-electric dipole antenna with excellent beam-scanning radiation patterns and reasonably low side lobes and low cross polarizations. The antenna comprises: an asymmetrical substrate integrated coaxial line feed comprising: a first substrate having a first substrate thickness; a second substrate placed on the first substrate and having a second substrate thickness different from the first substrate thickness; a conductive signal line deposited on an upper surface of the first substrate; and two rows of waveguiding vias positioned along and at both sides of the signal line respectively; a Γ-shaped probe adopted to excite the antenna; a pair of shorted planar parallel plates serving as magnetic dipole and two pair of vertical conductive vias serving as electric dipole; and a folded vertical reflector consisting of conductive vias and strips is added to reduce the back radiation and to improve the gain of antenna.

Millimeter-wave end-fire magneto-electric dipole antenna

A planar complementary antenna and an antenna array with multiple planar complementary antennas. The planar complementary antenna has a substrate, a planar dipole antenna arranged on the substrate, a loop antenna arranged on the substrate and operably connected with the planar dipole antenna, and a feed network for connection with a feed source. The feed network is operably connected with the planar dipole antenna and the loop antenna for feeding an electrical signal from the feed source to the planar dipole antenna and the loop antenna so as to form an electric dipole at the planar dipole antenna and a magnetic dipole at the loop antenna.

Planar complementary antenna and related antenna array

An antenna with a substrate having a ground plane includes a fractal antenna arranged on the substrate to achieve aperture miniaturization. The fractal antenna has a first pair of patch antenna sections that are spaced apart. A first pair of electric conductive elements are spaced apart, extending in the substrate, and arranged generally orthogonal to the first pair of patch antenna sections. Each of the first pair of electric conductive elements is operably connected with a respective one of the first pair of patch antenna sections. A first feeding mechanism is operably connected with the first pair of patch antenna sections for feeding the first pair of patch antenna sections.

Antenna

An aperture coupled, single fed, microstrip line feed for a circularly polarized patch antenna is provided that can transmit transmissions with a low profile, wide impedance, and axial ratio bandwidths. The circularly polarized patch antenna includes a double sided printed circuit board with a non-linear slots etched into a ground plane of one side of the printed circuit board, with a printed microstrip line printed on the opposite side of the printed circuit board. The microstrip line can be hook shaped and intersect each of the slots. The non linear slots can be radially arranged around a locus or area on the circuit board. A metal patch can placed above the ground plane and electromagnetic waves emanating from the microstrip line can couple to the patch through the non-linear strips and excite the patch such that it radiates an electromagnetic transmission

Aperture-coupled microstrip-line feed for circularly polarized patch antenna

A dual polarized high gain and wideband complementary antenna is presented herein. A dual polarized antenna can include a ground plane, a folded dipole portion electrically coupled to the ground plane, a shorted patch antenna portion including an open end that is electrically coupled to the folded dipole portion, and a metal plate located at a bottom portion of the dual polarized antenna. In one example, the folded dipole portion can include four folded dipoles. Further, the open end of the shorted patch antenna portion can be electrically coupled to the folded dipole portion using the metal plate. Further, the dual polarized antenna can include two ports&#x2014;each port including a pair of feeding sources, and each feeding source configured to generate an electric dipole and a magnetic dipole. In another example, magnitudes of the electric dipoles can be equivalent, and magnitudes of the magnetic dipoles can be equivalent.

Dual polarized high gain and wideband complementary antenna

Described herein are shorted bowtie patch antennas. The shorted bowtie patch antenna includes parasitic shorted patches. Signals are received by the shorted bowtie patch antenna. The received signals are propagated to a receiver. Signals sent from a transmitter are transmitted by the shorted bowtie patch antenna. Current is induced in the parasitic shorted patches during receiving and transmitting of signals.

Shorted bowtie patch antenna with parasitic shorted patches

An aperture coupled, single fed, microstrip line feed for a circularly polarized patch antenna is provided that can transmit transmissions with a low profile, wide impedance, and axial ratio bandwidths. The circularly polarized patch antenna includes a double sided printed circuit board with a non-linear slots etched into a ground plane of one side of the printed circuit board, with a printed microstrip line printed on the opposite side of the printed circuit board. The microstrip line can be hook shaped and intersect each of the slots. The non linear slots can be radially arranged around a locus or area on the circuit board. A metal patch can placed above the ground plane and electromagnetic waves emanating from the microstrip line can couple to the patch through the non-linear strips and excite the patch such that it radiates an electromagnetic transmission.

An antenna is disclosed as including at least one dipole connected with at least one shorted patch antenna, and at least two feeding sources.

High gain and wideband complementary antenna

The present invention provides a patch antenna comprising a patch spaced from a ground plane and two L-shaped feed probes. Each feed probe is connected to a respective input port and has a portion extending parallel to the patch. The antenna further includes at least two walls extending from the ground plane towards the patch. The walls are positioned between the L-shaped feed probes so as to permit direct propagation between the input ports and also to create indirect diffraction paths between the input ports that serve to cancel at least a part of said direct propagation.

Isolation enhancement technique for dual-polarized probe-fed patch antenna

A small transceiver device and antenna system has an insulating layer with first and second surfaces. A transmit loop element having transmit loop segments is formed on the first surface. The transmit loop segments are disposed in a transmit zigzag configuration. A receive loop element having receive loop segments is formed on the second surface. The receive loop segments are disposed in a receive zigzag configuration. Each receive loop segment in the receive zigzag configuration is skewed with respect to a closest transmit loop segment disposed in the transmit zigzag configuration. The transmit loop segments can be grouped in two or more transmit zigzag configurations, and the receive loop segments can be grouped in two or more receive zigzag configurations.

Stacked loop antenna

An antenna design comprises a patch that may be rectangular, circular, triangular or any other geometric shape and which is disposed by a dielectric a distance above a ground plane. The patch is driven by an L-shaped probe disposed between the patch and the ground plane. The probe has a first portion normal to both the patch and the ground plane, and a second portion parallel to the patch and the ground plane. The lengths of the two portions are selected so that the inductive reactance of the first portion is cancelled by the capacitive reactance of the second portion. In alternative embodiments a plurality of such patch antennas may be connected together via a single transmission network to form an antenna array.

Growing community of inventors

Hong Kong, China

Kwai Man Luk