Her Majesty the Queen in Right of Canada, As Represented by the Minister

Her Majesty the Queen in Right of Canada As Represented by the Minister of Industry Through the Communications Research Centre Canada

Her Majesty the Queen in the Right of Canada, As Represented by the Minister of Industry, Through the Communication Research Centre Canada

Aldo Petosa

Apisak Ittipiboon

Michel Cuhaci

Nicolas Gagnon

Jafar Shaker

Khelifa Hettak

Rajesh Kumar Mongia

Jonathan Ethier

Ming Li

Reza Chaharmir

Richard LaRose

Soulideth Thirakoune

David Lee

Marc Lapierre

Yahia Autar

Kathia L&eacute;vis

Derek A McNamara

Dave Roscoe

An electronic component such as a voltage controllable reconfigurable capacitor or transistor is formed by printing one or more layers of ink on a non-conductive substrate. Ferroelectric ink or semi-conductive ink is printed and conductive resistive or dielectric ink is printed on a s same or different layers. Reconfigurability is achieved by printing resistive biasing circuitry wherein when a changing voltage is applied to the biasing circuitry, an electronic property of the electronic component changes in response to the changing voltage.

Printed reconfigurable electronic circuit

A thin electromagnetic phase shifting element, named phase and amplitude shifting surface (PASS), is disclosed. The PASS is capable of independently altering both the phase and the amplitude distribution of the electromagnetic fields propagating through the structure. The element comprises a few patterned metallic layers separated by dielectric layers. The patterns of the metallic layers are tuned to locally alter the phase and/or the amplitude of an incoming electromagnetic wave to a prescribed set of desired values for the outgoing electromagnetic wave. The PASS can be applied to design components such as gratings, lenses, holograms, and various types of antennas in the microwave, millimeter wave and sub-millimeter wave.

Phase element comprising a stack of alternating conductive patterns and dielectric layers providing phase shift through capacitive and inductive couplings

An ultra-wideband antenna for operating in a frequency is disclosed wherein a monopole antenna extends from a ground plane. The monopole has an effective length L of one quarter wavelength at the lowest frequency f. A dielectric resonator antenna (DRA) surrounds the monopole antenna for resonating at substantially between or at two and three times the lowest frequency f, the DRA is of a height of less than &#xbe; L and is disposed in such a manner as being above the ground plane and either contacting or spaced therefrom by a gap G, wherein 0&#x2266;G&#x2266;0.2 H. The ultra-wideband antenna is of a much greater bandwidth than the sum of bandwidth of the monople or the DRA alone.

Ultra wideband antenna

The invention relates to an antenna structure for radiating electromagnetic waves in predetermined polarization configurations. A dielectric substrate is provided with a copper conductive pattern printed on each side. The conductors act as scattering elements and are printed for scattering radiation provided along a first predetermined feed direction or alone a second feed direction independently. Preferably, the pattern of the copper is based on an interference pattern and two feeds are used, one to provide radiation along each of the two feed directions. When used as a traveling wave antenna, the resulting structure is flat, having a low profile, and lightweight with simple electronics. Improved isolation Occurs when the printed interference patterns each contain only a component along a single direction such that each scattering element is linear and is parallel to or orthogonal to other scattering elements.

Dual-polarized and circular-polarized antennas

A dielectric loaded microstrip patch antenna is provided for delivering relatively wide operational bandwidth dual-band, with relatively good isolation and flexibility for circular polarization, while having a compact design and lightweight to suit mobile and wireless applications. The microstrip patch antenna has a conducting ground plane and a patch radiator. The patch radiator is spaced from the ground plane by a substantial distance having a first dielectric material therein. A slot feed in the ground plane provides the patch radiator with radio signal energy across the space having the first dielectric material therein. A piece of a second dielectric material is disposed adjacent the slot feed between the patch radiator and the ground plane. The second dielectric material has a dielectric constant that is higher than the dielectric constant of the first dielectric material. The piece of the second dielectric material acts to load the feed in order to improve coupling between the slot and the patch. The piece has a dimension along one of the x and y axes smaller than a dimension of the patch along a same axis. Since the piece is situated between the ground plane and the patch it determines operational characteristics of the microstrip patch antenna.

Dielectric loaded microstrip patch antenna

A dielectric resonator antenna system is disclosed wherein a dielectric material having a high dielectric constant is placed between a dielectric resonator antenna (DRA) and the antenna feed. Preferably the dielectric material having a high dielectric constant is either in the form of an insert within a cavity of the DRA or alternatively is in the form of a thin layer between the feed and the DRA for enhancing coupling therebetween. It is preferred that the high dielectric constant material be at least twice the value of the dielectric resonator antenna.

Broadband nonhomogeneous multi-segmented dielectric resonator antenna

Growing community of inventors

Nepean, Canada

Aldo Petosa