Hong Kong Applied Science and Technology Research Institute Company, Limited

Angus C K Mak

Corbett Ray Rowell

Chi-Lun Mak

Hau Wah Lai

Lap-Kun Yeung

Systems and methods which utilize a symmetrical partially coupled microstrip slot feed patch antenna element configuration to provide highly decoupled dual-polarized wideband patch antenna elements are shown. Embodiments provide a microstrip slot feed configuration in which a slot of a first signal feed is centered with respect to the patch and further provide a microstrip slot feed configuration in which slots of a second signal feed are symmetrically disposed with respect to the center of the patch and at positions near the edges of the patch. The microstrip feed utilized in communicating signals with respect to the slots of the second signal feed is adapted to provide signals of substantially equal amplitude and 180&#xb0; out of phase with respect to each other according to embodiments. The second signal feed configuration utilized according to embodiments provides partial coupling between the patch and the second signal feed.

Symmetrical partially coupled microstrip slot feed patch antenna element

Systems and methods which utilizes a stub array microstrip line for providing a phase shifter configuration are shown. A stub array microstrip line phase shifter of embodiments may comprises a microstrip line structure, an isolation structure, and a phase tuning structure cooperative to provide phase shifting of signals passed through the microstrip line structure. A microstrip line structure comprises a stub array microstrip line having a plurality of microstrip stubs provided in association with a slotted ground plane having a plurality of slots. The stub array microstrip line is adapted to provide compensation for capacitance and/or inductance associated with the slots of the slotted ground plane. A phase tuning structure provides coupling of signals transmitted by the stub array microstrip line to the slots of the slotted ground plane for signal phase shifting.

Stub array microstrip line phase shifter

An antenna system comprises a first antenna element mutually coupled with a second antenna element, the mutual coupling between the first and second antenna elements causing a first current in the second antenna element, and a coupling element disposed at least partially between the first and second antenna elements, wherein the coupling element is mutually coupled to each of the first and second antenna elements, and wherein the coupling element is configured to induce a second current in the second antenna element that at least partially cancels the first current.

Systems and methods employing coupling elements to increase antenna isolation

An antenna system comprising a first antenna element, a second antenna element, and a parasitic element, wherein the parasitic element is arranged with regard to the first antenna element and the second antenna element such that a greatest difference in gain between respective antenna patterns of the first and second antenna elements occurs at a null of the pattern of the first antenna element.

Direction finding antenna systems and methods for use thereof

A balun comprises at least two asymmetric coplanar striplines, a first of the striplines coupled to a signal input, and a second of the striplines coupled to a signal output, the at least two asymmetric coplanar striplines configured in a Marchand architecture to receive an unbalanced signal and to output a balanced signal.

Ultra-wideband/dualband broadside-coupled coplanar stripline balun

An antenna system comprising a first antenna element, a second antenna element, the first and second elements defining at least in part a slot element, an active switching network in communication with one or both of the first and second antenna elements, the switching network operable to cause the antenna system to resonate in each of two modes: a first mode wherein the first element resonates at a first set of frequencies, and the first element and a second element resonate together at a second set of frequencies; and a second mode wherein the first element resonates at the first set of frequencies, and the slot element resonates at a third set of frequencies.

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Shatin, China

Angus C K Mak