# US 12,763,473 B2 · Planar monopole loop composite multi-broadband antenna > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,763,473 B2 - Document ID: US12763473B2 - Status: Granted - Kind: B2 - Application number: 19/087,074 - Filed: 2025-03-21 - Published: 2026-07-02 - Granted: 2026-10-13 - Earliest claimed: 2024-12-30 - Assignees: Wieson Technologies Co., Ltd. - Applicants: Wieson Technologies Co., Ltd. - Inventors: I-Fong Chen; Chia-Mei Peng - Web page: https://patentgrep.com/patent/US12763473B2 ## CPC - H01Q 9/30: with feed to end of elongated active element, e.g. unipole (H01Q9/44 takes precedence) - H01Q 5/50: Feeding or matching arrangements for broad-band or multi-band operation - H01Q 7/00: Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop - H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72) ## Abstract The present invention is a planar monopole loop composite multi-broadband antenna, which designs the ground wire into a loop shape, surrounding the asymmetric T-shaped monopole signal line to increase the path of the antenna surface current and create low-frequency resonant frequency band of the antenna. The antenna has the characteristics of a balanced antenna, and the radiation performance and bandwidth of the antenna are not affected when the ground plane changes Placing the signal line close to the ground line creates a coupling effect to increase the path of the antenna's surface current, thereby increasing the flatness of the antenna's high-frequency resonant frequency band impedance bandwidth. ## Claims ### Claim 1 A planar monopole loop composite multi-broadband antenna, comprising: a carrier; a signal line in an asymmetric T-shape formed on said carrier, said signal line comprising a high frequency radiation portion and a first signal line extending from said high frequency radiation portion and coupled to a grounding area, so that a feed point for welding a preset cable is formed at the coupling location; and a loop grounding line formed on said carrier, said loop grounding line comprising a multi-turn low/medium frequency radiation portion, which surrounds said signal line and comprises an outer loop transmission path and an inner loop transmission path located on one side of said outer loop transmission path and extending inwardly, and a second signal line and a third signal line respectively located at two ends of said outer loop transmission path and coupled to said grounding area, said loop grounding line surrounding said signal line to form a co-planar waveguide feeding monopole antenna having dipole antenna characteristics. ### Claim 2 (depends on 1) The planar monopole loop composite multi-broadband antenna as claimed in claim 1, wherein said carrier refers to a flat printed circuit board, a plastic board or a three-dimensional metal antenna. ### Claim 3 (depends on 1) The planar monopole loop composite multi-broadband antenna as claimed in claim 1, wherein said high frequency radiation portion of said signal line comprises a top-loading portion on a top side thereof capable of adjusting impedance matching and bandwidth of a high-frequency resonant frequency band, said top-loading portion being in a narrow rectangular structure. ### Claim 4 (depends on 1) The planar monopole loop composite multi-broadband antenna as claimed in claim 1, wherein said first signal line of said signal line extends in a vertical direction and has an open stub capable of adjusting impedance matching and bandwidth of a high-frequency resonant frequency band. ### Claim 5 (depends on 1) The planar monopole loop composite multi-broadband antenna as claimed in claim 1, wherein said inner loop transmission path of said loop grounding line has an adjustment area capable of adjusting impedance matching and band width of a low-frequency resonant frequency band, said adjustment area being in a rectangular structure. ### Claim 6 (depends on 1) The planar monopole loop composite multi-broadband antenna as claimed in claim 1, wherein said loop grounding line has low-frequency signal transmission path that completes low-frequency signal transmission via said second signal line, said outer loop transmission path approximately in the shape of a “”, said inner loop transmission path approximately in the shape of an inverted letter “C”, and said third signal line in sequence. ### Claim 7 (depends on 1) The planar monopole loop composite multi-broadband antenna as claimed in claim 1, wherein said loop grounding line has an medium-frequency signal transmission path that completes medium frequency signal transmission via said second signal line, said outer loop transmission path in the shape of a “” and said third signal line in sequence; a radiation guide point is formed at each of the two intersections of said outer loop transmission path and said inner loop transmission path, so that wireless signal hopping is transmitted through said two radiation guide points to form electronic signal transmission in said outer loop transmission path beyond said inner loop transmission path. ### Claim 8 (depends on 1) The planar monopole loop composite multi-broadband antenna as claimed in claim 1, wherein said signal line is formed between two side lines of said outer loop transmission path and in a space formed below said inner loop transmission path; said first signal line, said second signal line and said third signal line are coupled with said grounding area to form a co-planar waveguide feed, said first signal line forms a live wire that is charged and said second signal line and said third signal line form a ground wire with no charge. ### Claim 9 (depends on 1) The planar monopole loop composite multi-broadband antenna as claimed in claim 1, wherein length of said signal line is one quarter of a center frequency of a high frequency band; and a length of said loop grounding line is one quarter of a center frequency of a low frequency band. ### Claim 10 (depends on 1) The planar monopole loop composite multi-broadband antenna as claimed in claim 1, which has a low-frequency operating band of 2.4 to 2.5 GHz, a medium-frequency operating band of 5.15 to 5.85 GHz, and a high-frequency operating band of 5.925 to 7.125 GHz.