META-STRUCTURE ANTENNA SYSTEM WITH ADAPTIVE FREQUENCY-BASED POWER COMPENSATION

• US 20190326684A1
• Filed: 04/22/2019
• Published: 10/24/2019
• Est. Priority Date: 04/20/2018
• Status: Active Grant

• Current Assignee: Metawave Corporation
• Original Assignee: Metawave Corporation
• Inventors: Achour, Maha, Alidio, Raul, Pelletti, Chiara
• Granted Patent: US 11,476,588 B2
• Time in Patent Office: Days
• CPC Class Codes: G01S 13/02 Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
• CPC Class Codes: G01S 13/343 using sawtooth modulation
• CPC Class Codes: G01S 13/345 using triangular modulation
• CPC Class Codes: G01S 13/4463 using phased arrays
• CPC Class Codes: G01S 13/931 of land vehicles
• CPC Class Codes: G01S 2013/0254 Active array antenna
• CPC Class Codes: G01S 7/03 Details of HF subsystems specially adapted therefor, e.g. common to transmitter and receiver
• CPC Class Codes: G01S 7/032 Constructional details for solid-state radar subsystems
• CPC Class Codes: G01S 7/35 Details of non-pulse systems
• CPC Class Codes: G01S 7/4013 involving adjustment of the transmitted power
• CPC Class Codes: H01Q 1/3233 particular used as part of a sensor or in a security system, e.g. for automotive radar, navigation systems
• CPC Class Codes: H01Q 1/36 Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewithH01Q1/08, H01Q1/14 take precedence
• CPC Class Codes: H01Q 13/22 Longitudinal slot in boundary wall of waveguide or transmission line H01Q13/203 takes precedence
• CPC Class Codes: H01Q 21/0025 Modular arrays
• CPC Class Codes: H01Q 21/064 using horn or slot aerials slotted waveguides arrays H01Q21/005
• CPC Class Codes: H01Q 3/34 by electrical means active lenses or reflecting arrays H01Q3/46
• CPC Class Codes: H04W 16/28 using beam steering

Abstract

Examples disclosed herein relate to a Meta-Structure (“MTS”) antenna system with adaptive frequency-based power compensation. The MTS antenna system includes a radiating array structure having a plurality of radiating elements, and a transmission array structure coupled to the radiating array structure and feeding a transmission signal through to the radiating array structure. The transmission array structure has a plurality of super element transmission paths, each having a plurality of vias to form transmission paths and a plurality of slots for feeding the transmission signal to the radiating array structure, and a plurality of power amplifiers coupled to an adaptive feedback module, each power amplifier coupled to a super element transmission path, the adaptive feedback module to adjust a power gain at a center frequency.

Claims

1. A Meta-Structure (“

MTS”

) antenna system with adaptive frequency-based power compensation, comprising;

a radiating array structure, comprising a plurality of radiating elements;

a transmission array structure coupled to the radiating array structure and feeding a transmission signal through to the radiating array structure, the transmission array structure comprising;

a plurality of super element transmission paths, each having a plurality of vias to form transmission paths and a plurality of slots for feeding the transmission signal to the radiating array structure; and

a plurality of power amplifiers coupled to an adaptive feedback module, each power amplifier coupled to a super element transmission path, the adaptive feedback module to adjust a power gain at a center frequency.

2. The MTS antenna system of claim 1, wherein the adaptive feedback module comprises a look-up table (“

LUT”

) to store a set of power levels corresponding to a set of frequencies.

3. The MTS antenna system of claim 1, wherein the adaptive feedback module is to adjusts the power gain at a center frequency to compensate for gain at frequencies sensed from the plurality of super element transmission paths.

4. The MTS antenna system of claim 1, wherein the radiating elements comprise meta-structures.

5. The MTS antenna system of claim 1, further comprising a phase control module to change a plurality of phases of signals propagating the through transmission array structure.

6. A radiating structure, comprising:

a plurality of slotted transmission lines, comprising;

a plurality of boundary lines defining each transmission line, wherein slots are positioned along a length of each transmission line; and

a plurality of irises positioned proximate each of the slots, wherein the plurality of irises are equally spaced along the length of each transmission line;

an array of radiating elements proximate the slotted transmission lines so as to receive a transmission signal from the slotted transmission lines and generate a radiation pattern corresponding to the transmission signal; and

an adaptive compensation mechanism coupled to the radiating structure for compensating for antenna squint in the radiating structure.

7. The radiating structure as in claim 6, wherein the slots are evenly spaced along the length of each transmission line.

8. The radiating structure as in claim 7, wherein the slots are equidistant from a center line along the length of each transmission line.

9. The radiating structure as in claim 7, wherein the plurality of irises are positioned in sets of irises opposite each of the slots.

10. The radiating structure as in claim 6, wherein the plurality of irises are vias formed through a layer of the radiating structure.

11. The radiating structure as in claim 6, further comprising a reactance control mechanism for adjusting a phase of the metamaterial array of elements.

12. The radiating structure as in claim 11, wherein the reactance control mechanism is at least one varactor coupled between conductors in the metamaterial array of elements.

13. The radiating structure of claim 6, wherein the adaptive compensation mechanism comprises a variable Power Amplifier (“

PA”

) coupled to an adaptive feedback module.

14. The radiating structure of claim 13, wherein the adaptive feedback module comprises a look-up table (“

LUT”

) to store a set of power levels corresponding to a set of frequencies.

15. The radiating structure of claim 13, wherein the adaptive feedback module adjusts a power gain from the PA to compensate for the antenna squint.

16. An antenna system, comprising:

a radiating array structure of radiating elements, the radiating elements arranged in a set of subarrays;

a feed network to provide a plurality of signals to the radiating array structure through a transmission array structure;

an antenna control module to control the radiating array structure; and

a frequency-based power compensation module coupled to the antenna control module to adjust a power level to the feed network based on changes in frequency.

17. The antenna system of claim 16, wherein the radiating elements comprise meta-structures.

18. The antenna system of claim 16, wherein the transmission array structure comprises a plurality of slotted transmission lines, comprising:

a plurality of boundary lines defining each transmission line, wherein slots are positioned along a length of each transmission line; and

a plurality of irises positioned proximate each of the slots, wherein the plurality of irises are equally spaced along the length of each transmission line.

19. The antenna system of claim 16, wherein the frequency-based power compensation module comprises a look-up table (“

LUT”

) to store a set of power levels corresponding to a set of frequencies.

20. The antenna system of claim 19, wherein the frequency-based power compensation module comprises a variable power amplifier coupled to the look-up table to adjust the power level to the feed network.