Radio communication antenna having narrow beam width

• US 10,224,643 B2
• Filed: 11/13/2015
• Issued: 03/05/2019
• Est. Priority Date: 05/14/2013
• Status: Active Grant

• Current Assignee: KMW Incorporated
• Original Assignee: KMW Incorporated
• Inventors: Moon, Young-Chan, Choi, Oh-Seog, Kim, In-Ho, Kim, Sang-Hyeong
• Primary Examiner(s): Tran, Hai
• Application Number:
  US14/941,016
• Publication Number:
  US 20160141765A1
• Time in Patent Office: 1,208 Days
• Field of Search: 343812, 343810, 343795
• CPC Class Codes: H01Q 1/246 specially adapted for base stations
• CPC Class Codes: H01Q 15/14 Reflecting surfaces; Equivalent structures electromagnetic shields H01Q1/526
• CPC Class Codes: H01Q 19/108 Combination of a dipole with a plane reflecting surface H01Q19/106 takes precedence; strip line H01Q9/065
• CPC Class Codes: H01Q 21/062 using dipole aerials; H01Q21/067, H01Q21/068 take precedence
• CPC Class Codes: H01Q 21/24 Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction circularly polarised patch antennas H01Q9/0428; circularly polarised horns H01Q13/0241; cross-polarised horns H01Q13/0258; polarisation converters H01Q15/242; cross-polarised rear feeds H01Q19/136; crossed polarisation dual antenna H01Q25/001
• CPC Class Codes: H01Q 21/26 Turnstile or like antennas comprising arrangements of three or more elongated elements disposed radially and symmetrically in a horizontal plane about a common centre
• CPC Class Codes: H01Q 21/293 one unit or more being an array of identical aerial elements adaptive arrays H01Q3/2605
• CPC Class Codes: H01Q 9/285 Planar dipole H01Q9/065 takes precedence; patch antenna H01Q9/0407

Abstract

In the present invention, a radio communication antenna having a narrow beam width comprises: a reflecting plate provided in the form of a plate of rectangular shape; and one radiating module disposed on the reflecting plate and generating x-polarized waves. Here: the radiating module comprises four radiating elements of dipole structure; the four radiating elements are respectively disposed at four edge portions of the reflecting plate, and each comprises two radiating arms placed in the direction extending along both sides relative to the edges; and, among the four radiating elements, those radiating elements that face each other diagonally are linked in movement so as to generate one of the x-polarized waves.

Claims

1. A radio communication antenna having a narrow beam width, the radio communication antenna comprising:

a reflective plate provided in the form of a tetragonal plate; and

a radiation module installed on the reflective plate and configured to generate crossed polarization,

wherein the radiation module comprises four radiation elements of a dipole structure, the four radiation elements are arranged at four corners of the reflective plate, respectively, two radiation arms extend along two edges with respect to one of the corners, and pairs of two radiation elements of the four radiation elements, which face each other in the diagonal direction interwork with each other and generate one polarization in the crossed polarization, and

a separate radiation module that installed at a central location of the radiation module formed by the four radiation elements on the reflective plate and generates an additional crossed polarization which combines with the crossed polarization to form a radiation beam having a predetermined beam width of the radio communication antenna, and the additional crossed polarization has the same frequency as the crossed polarization.

2. The radio communication antenna of claim 1, wherein a distance between the radiation elements which face each other in a diagonal direction is determined to be maximal within a range of 1λ

in consideration of the processed frequency.

3. The radio communication antenna of claim 2, wherein the reflective plate is designed not to have an area that deviates from an installation area of the four radiation elements and substantially extends to an exterior of the radio communication antenna.

4. The radio communication antenna of claim 1, further comprising:

four directors of a conductive material that are fixedly installed in the directions in which beams of the four radiation elements are radiated.

5. The radio communication antenna of claim 4, wherein the four directors have metal bar shapes that extend along the directions of polarizations generated by the radiation elements, and are installed on the upper sides of the radiation elements corresponding to a feeding portion between two radiation arms.