Microstrip array antenna

Patent metadata

Field	Value
Publication number	US-12412990-B2
Application number	US-202218083169-A
Country	US
Kind code	B2
Filing date	Dec 16, 2022
Priority date	Feb 25, 2022
Publication date	Sep 9, 2025
Grant date	Sep 9, 2025

Abstract

Provided is a microstrip array antenna including a dielectric substrate, a feed line formed on a top surface of the dielectric substrate, a plurality of radiation elements formed on the top surface of the dielectric substrate and electrically connected to the feed line, and a ground surface formed on a bottom surface of the dielectric substrate. At least one radiation element among the plurality of radiation elements may have a bottleneck shape.

First claim

What is claimed is:

1. A microstrip array antenna comprising:
a dielectric substrate;
a single microstrip feed line formed on a top surface of the dielectric substrate;
a plurality of microstrip stubs formed on the top surface of the dielectric substrate and electrically connected to the single microstrip feed line; and
a ground surface formed on a bottom surface of the dielectric substrate,
wherein the plurality of microstrip stubs comprises a first plurality of microstrip stubs having a bottleneck shape and a second one of the plurality of microstrip stubs having a rectangular shape, and
wherein the first plurality of microstrip stubs are arranged in a zigzag form at a regular distance on both sides of the center of the single microstrip feed line and the second plurality of microstrip stubs are arranged in a zigzag form at a regular distance on both sides of the ends of the single microstrip feed line.

2. The microstrip array antenna of claim 1 , wherein the plurality of microstrip stubs is arranged by a regular distance on one side of the single microstrip feed line or arranged in a zig-zag form on both sides of the single microstrip feed line.

3. The microstrip array antenna of claim 2 , wherein the distance is adjusted according to a direction of a main beam of the microstrip array antenna.

4. The microstrip array antenna of claim 1 , wherein the single microstrip feed line is directly connected to a chip or a transmission line to receive power from the chip or the transmission line.

5. The microstrip array antenna of claim 4 , wherein the single microstrip feed line comprises various forms of transitions.

6. The microstrip array antenna of claim 4 , further comprising a matching circuit for impedance matching with the chip or the transmission line.

7. The microstrip array antenna of claim 6 , wherein the matching circuit comprises a quarter wavelength transformer.

8. The microstrip array antenna of claim 1 , wherein the microstrip array antenna has various characteristic impedances according to design of the single microstrip feed line to have different widths.

9. The microstrip array antenna of claim 1 , wherein each of the plurality of microstrip stubs is designed to have different radiation conductance for weighted amplitude design.

Assignees

• Electronics & Telecommunications Res Inst

Inventors

• Lee Jaeho
• Kim Jang Yeol
• Oh Jung Hoon
• Lee Hyunjoon
• Cho In Kui

Classifications

• H01Q1/48

  Earthing means; Earth screens; Counterpoises · CPC title

• H01Q1/46

  Electric supply lines or communication lines · CPC title

• H01Q1/38

  formed by a conductive layer on an insulating support {(patch antennas H01Q9/0407; microstrip dipole antennas H01Q9/065; microstrip slot antennas H01Q13/106; transmission line microstrip antennas H01Q13/206; manufacturing reflecting surfaces using insulating material for supporting the reflecting surface  H01Q15/142)} · CPC title

• H01Q13/206 Primary

  Microstrip transmission line antennas · CPC title

• H01Q21/061 Primary

  Two dimensional planar arrays · CPC title