M/a -Com, Inc.

Other

Tyco Electronics Corporation

Mia-Com, Inc.

Cobham Defense Electronic Systems Corporation

Eswarappa Channabasappa

Kristi Dhimiter Pance

Frank Stan Kolak

Richard Alan Anderson

Noyan Kinayman

Nitin Jain

Robert Gyorgy Egri

Bernhard Alphonso Ziegner

Adil Khalil

Allan Buckle

Thongchai Hongsmatip

Chris McNamara

An antenna formed on a dielectric substrate having first and second opposing surfaces, a first meander antenna element disposed on the first surface of the substrate and a second meander antenna element disposed on the second surface of the substrate.

Multi section meander antenna

The invention provides a compact patch antenna having a cavity underneath the driver patch, so that the electromagnetic volume of the antenna is expanded without increasing the overall area of the antenna. More specifically, the compact patch antenna comprises a base layer having a cavity, a ground plane located on the base layer, and having an opening over at least a portion of the cavity, a substrate located on the ground plane, and a driver patch located on the substrate. The invention further provides a method for constructing a compact patch antenna, comprising the steps of providing a base layer having a cavity, providing a ground plane located on the base layer, and having an opening over at least a portion of the cavity, providing a substrate located on the ground plane, and providing a driver patch located on the substrate.

Compact broadband patch antenna

A planar antenna comprising a signal path for receiving or transmitting a signal, a conductive layer having a slot formed therein positioned to electromagnetically couple with the signal path, a conductive plate parallel to and overlying the slot and spaced therefrom by a dielectric layer, the conductive plate being electrically in contact with the signal path, and one or more patches parallel to and above the conductive plate.

Compact planar antenna for single and multiple polarization configurations

A dual polarization planar antenna comprising a first layer comprising a first patch, a second layer beneath the first layer comprising a first feed line for coupling a first signal to the first patch and a second feed line for coupling a second signal to the first patch such that the first patch radiates a field that has two different polarizations, and a third layer comprising first and second coupling discs electrically connected to the first feed line and third and fourth coupling discs electrically connected to the second feed line, wherein the first and second discs are electrically coupled to each other by a first half wavelength conductor and the third and fourth discs are electrically coupled the each other by a second half wavelength conductor, the first and second half wavelength conductors not being disposed in the second layer.

Multi-polarization planar antenna

A multi-element antenna with sufficiently small return loss and mutual coupling signals to allow the simultaneous transmission of powerful radar signals and the reception of faint target return signals. The microstrip patch antenna has radio frequency absorbing material place between neighboring antenna elements to reduce the mutual coupling leakage signals.

System and method of using absorber-walls for mutual coupling reduction between microstrip antennas or brick wall antennas

In accordance with the principles of the present invention, a dielectric resonator is provided with a longitudinal through hole with a diameter that varies as a function of height of the resonator so as to increase the frequency spacing between the fundamental mode and the spurious modes.

Dielectric resonator with variable diameter through hole and filter with such dielectric resonators

The invention comprises a technique and associated mechanisms by which dielectric resonator circuits, such as filters, can be tuned in both frequency, bandwidth or both without the need for irises, tuning screws and/or tuning plates. In accordance with the invention, the positions of the dielectric resonators are adjustable relative to each other within the cavity in multiple ways, including vertically and horizontally. The dielectric resonators also may tilt relative to each other. Furthermore, an off-center longitudinal hole can be machined in one or more of the dielectric resonators so as to make the electromagnetic field of the resonator non-uniform so that the dielectric resonator can be rotated about its longitudinal axis to alter the coupling between dielectric resonators. In accordance with another aspect of the invention, frequency tuning can be accomplished by using two separate dielectric resonators adjacent each other, one on top of the other, and adjusting the vertical spacing therebetween to achieve the desired center frequency within that dielectric resonator pair.

Method and mechanism for tuning dielectric resonator circuits

A dielectric resonator having variable cross-section, preferably varying monotonically, and, most preferably, the resonator being in the shape of a truncated cone. Such shapes displace the Hmode from the TE mode in the longitudinal direction of the cone. Truncating the cone to eliminate the portion of the cone where the Hmode exists, virtually eliminates the Hmode. A circuit comprising a plurality of these resonators may be arranged in an enclosure with each resonator longitudinally inverted relative to adjacent resonator(s) to provide a compact design with enhanced coupling and adjustability. A spiral coupling loop provides high magnetic flux in a small physical volume for coupling energy into or out of the circuit. Alternately, the resonator can coupled to a microstrip by placing the resonator upside-down near the microstrip, whereby the TE mode is immediately above the microstrip, providing enhanced coupling there between.

Dielectric resonators and circuits made therefrom

In accordance with the principles of the present invention, a resonator puck is provided with one or more vertical and/or horizontal, radial slits that improve the quality factor, Q, of circuits constructed from the resonators. In some embodiments of the invention, the surfaces of the resonators that define the slit are left relatively rough and may even contact each other such that the slit is not of uniform thickness, but essentially comprises a plurality of pockets between the two portions of the resonator.

Slotted dielectric resonators and circuits with slotted dielectric resonators

A connection arrangement for a micro lead frame plastic (MLP) package is provided that includes a paddle configured to be connected to a circuit board and a first ground pad and a second ground pad each connected to the paddle. The first and second ground pads together with the paddle are configured to provide continuity of ground between the circuit board and a chip mounted to the paddle.

connection arrangement for micro lead frame plastic packages

A cross-coupled dielectric resonator circuit. Resonator circuits in accordance with the invention may be used to build low-loss compact filters, oscillators, and other circuits, particularly microwave circuits. The resonators are arranged relatively to each other within an enclosure in a very efficient and compact design that enhances adjustability and coupling between adjacent resonators and the cross-coupling of alternate resonators.

Cross-coupled dielectric resonator circuit

In accordance with the principles of the present invention, a resonator puck is provided with one or more vertical and/or horizontal, radial slits that improve the quality factor, Q, of circuits constructed from the resonators. Preferably, the slits are very narrow and, more preferably, about 100 to 1000 atoms wide. In some preferred embodiments of the invention, the surfaces of the resonators that define the slit are left relatively rough and may even contact each other such that the slit is not of uniform thickness, but essentially comprises a plurality of pockets between the two portions of the resonator.

An antenna unit formed in the shape of a hollow box comprising (a) a substrate forming the front side of the antenna unit, (b) a first microstrip antenna array formed on the substrate, (c) a second microstrip antenna array formed on the substrate, (d) a ground plane forming the rear side of the antenna unit, and (e) a plurality of periodic filters formed on the ground plane. The periodic filters are formed by etching a series of circular patterns, or holes, through the ground plane. The periodic stop band filters provide for improved isolation between the microstrip antenna arrays, without the need for adding additional costly or space consuming components.

Microstrip antenna array with periodic filters for enhanced performance

A spatial power divider/combiner that comprises: a housing containing a first channel forming three sides of a rectangular input waveguide and a second channel forming three sides of a rectangular output waveguide; a board coupled to the housing, wherein the underside of the board forms the fourth side of the input and output waveguides; a series of slots etched on the underside of the board located in the input waveguide to divide an input signal; a series of slots etched on the underside of the board located in the output waveguide to recombine the divided signal; and a series of microstrip lines printed on the top side of the board to couple the input waveguide and the output waveguide. Additionally, the divider/combiner can comprise a series of active devices, such as MMIC power amplifier, to provide a spatial power amplifier.

Growing community of inventors

Acton, MA, United States of America

Eswarappa Channabasappa