Motorola Corporation

Maxtena, Inc.

Carlo Di Nallo

Antonio Faraone

Giorgi G Bit-Babik

John Allan Svigelj

Robert E Stengel

Quirino Balzano

Simone Paulotto

Revaz Zaridze

An antenna system includes a metal housing including a first edge and a second edge that meet at a corner and a slot located proximate the second edge that extends from the first edge parallel to the second edge defining a strip and an antenna located behind and in close proximity to the strip. The antenna is coupled to the strip. A parasitic element is located proximate the antenna and the strip includes a ground coupling that crosses the slot in spaced relation thereto. The parasitic element assists in establishing second and third higher frequency modes of the antenna system.

Antenna surrounded by metal housing

An antenna system includes a ground plane including a first corner and a second corner that are positioned along a first common edge. A first antenna element is disposed at the first corner of the ground plane and includes a first slot. A second antenna element is disposed at the second corner of the ground plane and includes a second slot. The first antenna element and the second antenna element are fed with an electromagnetic signal and the electromagnetic signal at the first antenna element is approximately 90 degrees shifted from the signal at the second antenna element. The first antenna element and the second antenna element form an antenna structure, and the antenna structure transmits circularly polarized radiation.

Low profile antenna pair system and method

An antenna () comprises an input port () for feeding an electrical signal, a radiating element () coupled to the input port that radiates energy of the electrical signal, a second port () coupled to the radiating element, a ground structure () coupled to the radiating element and second port; and a negative slope reactance circuit () characterized by a negative slope of reactance versus frequency, coupled to the second port. The antenna has a wideband frequency range relative to a natural bandwidth of the antenna.

Electrically small wideband antenna

Multi-band antenna systems () for wireless communication devices () for use in wireless communications systems () are disclosed. The multi-band antennas systems include a conductive film () that include ground plane areas () and conductive traces () that substantially circumscribe areas that include a plurality of interconnected swaths (). The antenna systems are capable of operating in a first common mode for supporting communications in a first frequency band, and in a second common mode and differential mode for supporting communications in a second frequency band. Nulls of gain patterns of the second common and differential mode are offset, such that sum of the gain patterns does not include nulls.

Multi-band antennas

Antenna systems ( ) comprise a dielectric resonator antenna ( ) in the shape of a parallelepiped with right angle corners. The thickness (T) of the dielectric resonator antenna ( ) is chosen to be less than the length and height. The antenna systems ( ) provide have broad band response that is attributed to two or more resonant modes that have center frequencies that are closely spaced in frequency relative to their bandwidths. Additional pass bands can be obtained by placing a conductive strip ( ) along an edge of the dielectric resonator The passband associated with the conductive strip ( ) can be lowered in frequency by capacitively loading the conductive strip ( ). An additional passband can also be obtained by coupling a metal ribbon ( ) to a feed in microstrip ( ) and to the dielectric resonator antenna ( ).

Broad band and multi-band antennas

The invention provides antenna systems ( ) for wireless communication devices that make efficient use of space while supporting multi-band operation. The antenna systems comprise elongated flat conductors ( ), supported spaced from finite ground planes ( ). The antenna systems are capable of operating in a symmetric common mode, an anti-symmetric differential mode, and a slot mode.

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Plantation, FL, United States of America

Carlo Di Nallo