# US 2021/0242586 A1 · Distributed Control System for Beam Steering Applications

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- Number: US 2021/0242586 A1
- Document ID: US20210242586A1
- Status: Published application
- Kind: A1
- Application number: 17/233,862
- Filed: 2021-04-19
- Published: 2021-08-05
- Earliest claimed: 2016-11-30
- Assignees: AVX Antenna, Inc. d/b/a Ethertronics, Inc.
- Applicants: AVX Antenna, Inc. d/b/a Ethertronics, Inc.
- Inventors: Abhishek Singh; Laurent Desclos
- Web page: https://patentgrep.com/patent/US20210242586A1

## CPC

- H01Q 3/44: varying the electric or magnetic characteristics of reflecting, refracting, or diffracting devices associated with the radiating element
- H01Q 5/378: Combination of fed elements with parasitic elements
- H01Q 1/523: {between antennas of an array}
- H01Q 3/2611: {Means for null steering; Adaptive interference nulling}
- H01Q 3/2629: {Combination of a main antenna unit with an auxiliary antenna unit}
- H01Q 5/385: Two or more parasitic elements
- H01Q 9/0421: {with a shorting wall or a shorting pin at one end of the element (H01Q9/0414 takes precedence)}
- H01Q 13/08: Radiating ends of two-conductor microwave transmission lines, e.g. of coaxial lines, of microstrip lines
- H01Q 13/206: {Microstrip transmission line antennas}
- H01Q 19/005: {Patch antenna using one or more coplanar parasitic elements}
- H01Q 21/28: Combinations of substantially independent non-interacting antenna units or systems {(multiple beam H01Q25/00)}
- H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72)

## Abstract

A technique is described where the switch and/or tunable control circuit for use with an active multi-mode antenna is positioned remote from the antenna structure itself for integration into host communication systems. Electrical delay and impedance characteristics are compensated for in the design and configuration of transmission lines or parasitic elements as the active multi-mode antenna structure is positioned in optimal locations such that significant electrical delay is introduced between the RF front-end circuit and multi-mode antenna. This technique can be implemented in designs where it is convenient to locate switches in a front-end module (FEM) and the FEM is located in vicinity to the transceiver.

## Claims

### Claim at position 1

1-18. (canceled)

### Claim 19

An antenna system comprising:
a multi-mode antenna configurable in a plurality of modes, each of the plurality of modes having a distinct radiation pattern, the multi-mode antenna comprising:
a radiating element comprising a vertical portion and a horizontal portion, the vertical portion disposed on a ground plane, the horizontal portion extending from the vertical portion such that an antenna volume is defined between the ground plane and the horizontal portion of the radiating element; and
a parasitic element positioned outside of the antenna volume;
wherein the antenna system further comprises:
a conductor that is spaced apart from the ground plane, the conductor coupled between the parasitic element and an active tuning circuit configured to vary a reactance of the parasitic element to configure the multi-mode antenna in one of the plurality of modes.

### Claim 20 (depends on 19)

The antenna system of claim 19, further comprising:
a transmission line coupled between the radiating element and the active tuning circuit.

### Claim 21 (depends on 20)

The antenna system of claim 20, wherein the transmission line comprises a coaxial transmission line, a microstrip transmission line, a stripline transmission line, a co-planar waveguide, or a parallel wire transmission line.

### Claim 22 (depends on 20)

The antenna system of claim 20, wherein the transmission line comprises a single conductive trace.

### Claim 23 (depends on 20)

The antenna system claim 20, further comprising:
a transformer circuit coupled between the transmission line and the active tuning circuit.

### Claim 24 (depends on 23)

The antenna system of claim 23, wherein the transformer circuit comprises one or more passive electrical components.

### Claim 25 (depends on 24)

The antenna system of claim 24, wherein the one or more passive electrical components comprise one or more inductors, one or more capacitors, or one or more resistors.

### Claim 26 (depends on 19)

The antenna system of claim 19, wherein the parasitic element comprises a vertical portion and a horizontal portion, the vertical portion of the parasitic element extending from the ground plane, the horizontal portion of the parasitic element extending from the vertical portion of the parasitic element such that the horizontal portion of the parasitic element is spaced apart from the ground plane.

### Claim 27 (depends on 26)

The antenna system of claim 26, wherein the conductor is coupled to the parasitic element at a junction where the vertical portion of the parasitic element and the horizontal portion of the parasitic element meet.

### Claim 28 (depends on 26)

The antenna system of claim 26, further comprising:
a transmission line coupled between the active tuning circuit and the conductor.

### Claim 29 (depends on 28)

The antenna system of claim 28, wherein the transmission line comprises a conductive trace.