Patents
US 12633677 B2: Coplanar side-fed tightly coupled array with dual-polarization
- Granted
- 2026-05-19
- Filed
- 2022-05-19 application 17748160
- Type
- Utility · 13 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
An ultra-wideband dual-polarized tightly coupled bowtie antenna array for ground-based polar ice sounding radar is described. The antenna array has a very large effective aperture to increase the directivity. At the same time, it is lightweight and low profile to minimize the payload and maximize the survey range. In an implementation, the antenna array operates between 180-620 MHz with a fractional bandwidth of 3.4:1. The broadband performance benefits from the tightly coupled antenna elements. A feature of the antenna array is the planar feeding structure without balun. The antenna array element has the microstrip feeding line integrated with one arm of the bowtie antenna. The other arm is directly fed by the microstrip line. By adding a ferrite core around the coax cable for common mode suppression, the bowtie antenna element can be fed differentially without using bulky vertical feeding structure and balun.
Source: PTBLXML, file of 2026-05-19 (ipgb20260519.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| The Board of Trustees of The University of Alabama 193 patents | US company or organization | Tuscaloosa, AL | The University of Alabama College or university FUZZY medium confidence: same name (governing-board words and legal endings aside) and state | PTBLXML, file of 2026-05-19 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Linfeng Li | Tuscaloosa, AL | 10 | PTBLXML, file of 2026-05-19 | |
| Stephen Jie Bang Yan | Northport, AL | PTBLXML, file of 2026-05-19 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| H01Q | Antennas, i.e. radio aerials | H01Q21/24 | PTBLXML, file of 2026-05-19 |
Cooperative Patent Classification, as currently assigned (one row per subclass).
Assignments and security interests
| Recorded | What | From | To | Reel/frame | Source |
|---|---|---|---|---|---|
| 2024-05-20 | Assignment Assignment of assignor's interest | LI, LINFENG signed 2021-06-22 YAN, STEPHEN JIE BANG signed 2021-06-23 | THE BOARD OF TRUSTEES OF THE UNIVERSITY OF ALABAMA TUSCALOOSA, AL | 67460/55 | PASDL, file of 2026-10-15 |
Documents recorded with the USPTO Assignment Recordation Branch that list this patent. A security interest is a lender’s claim on the patent as collateral; a release ends it.
USPTO bulk data: PatentsView granted patents, disambiguated (PVGPATDIS) for patents, assignees, inventors, places and CPC categories; the USPTO Patent Assignment Dataset (ECORSEXC) for assignments and security interests. Patents filed in the last 20 years. No claims or full text. Links to other records are by name (and state): EXACT means the identical full name and state; FUZZY means a looser name match, with the confidence shown.