Distributor and planar antenna

Patent metadata

Field	Value
Publication number	US-9972900-B2
Application number	US-201514836981-A
Country	US
Kind code	B2
Filing date	Aug 27, 2015
Priority date	Sep 16, 2014
Publication date	May 15, 2018
Grant date	May 15, 2018

Abstract

Provided is a distributor capable of reducing insertion loss while suppressing a ratio in power distribution among output lines from being changed. The distributor 4 is a distributor that is connected with an input line Lin and output lines Lo 1 to Lo 3 respectively formed on a dielectric substrate 10 as microstrip lines, and distributes to the output lines Lo 1 to Lo 3 high frequency power fed from a feeding point to a branching point through the input line Lin. In addition, the distributor 4 is configured to include a stub area 42 that is formed in the input line Lin, is separated from the branching point 41 , and has a rectangular shape wider than line widths of a first area La and a second area Lb of the input line Lin. The stub area 42 is arranged in a position where the distance d 1 between an edge on the feeding point side and lateral edges 3 a on an input side of the output lines Lo 1 and Lo 3 substantially perpendicular to the input line Lin is substantially equal to (λg/4)×(2n+1) where λg is a guide wavelength and n is an integer.

First claim

The invention claimed is:

1. A distributor that is connected with an input line and two or more output lines respectively formed on a dielectric substrate as microstrip lines, and distributes to said two or more output lines high frequency power fed from a feeding point to a branching point through said input line, the distributor including
a stub area that is formed in said input line, is separated from said branching point by a section of said input line having a line width, and said stub area has a rectangular shape wider than a) a line width of said input line on a feeding point side and b) the line width of said section of said input line, wherein
said stub area is arranged in a position where a distance between an edge on said feeding point side and lateral edges on an input side of said output lines substantially perpendicular to said input line is substantially equal to (λg/4)×(2n+1) where λg is a guide wavelength and n is an integer, and
said input line has an area which is narrower in line width than the stub area and formed between the stub area and the branching point.

2. The distributor according to claim 1 , wherein
a length of said stub area in a line length direction is substantially equal to (λg/4)×(2m+1) where m is an integer.

3. The distributor according to claim 1 , wherein
line widths of said input line on said branching point side rather than said stub area and on said feeding point side rather than said stub area are substantially equal to each other.

4. The distributor according to claim 1 , wherein
said stub area includes two protrusion parts that protrude from both lateral edges of said input line in mutually opposite directions.

5. The distributor according to claim 1 , wherein
said branching point is formed as a cross-shaped area connected with said input line, two of said output lines substantially perpendicular to said input line, and one output line substantially parallel to said input line.

6. A planar antenna comprising:
feed lines that are formed on a dielectric substrate as microstrip lines;
a distributor that is connected with an input line and two or more output lines respectively as said feed lines, and distributes high frequency power fed from a feeding point to a branching point through said input line to said two or more output lines; and
two or more radiating elements that are excited by traveling waves propagating through said output lines, wherein:
said distributor has a stub area that is formed in said input line, is separated from said branching point by a section of said input line having a line width, and said stub area has a rectangular shape wider than a) a line width of said input line on a feeding point side and b) the line width of said section of said input line; and
said stub area is arranged in a position where a distance between an edge on said feeding point side and lateral edges on an input side of said output lines substantially perpendicular to said input line is substantially equal to (λg/4)×(2n+1) where λg is a guide wavelength and n is an integer.

7. The distributor according to claim 2 , wherein
line widths of said input line on said branching point side rather than said stub area and on said feeding point side rather than said stub area are substantially equal to each other.

8. The distributor according to claim 2 , wherein
said stub area includes two protrusion parts that protrude from both lateral edges of said input line in mutually opposite directions.

9. The distributor according to claim 2 , wherein
said branching point is formed as a cross-shaped area connected with said input line, two of said output lines substantially perpendicular to said input line, and one output line substantially parallel to said input line.

Assignees

• Nippon Pillar Packing
• Fujitsu Ten Ltd

Inventors

• Okunaga Takeshi
• Nakatsu Akira
• Hayakawa Eisuke
• Yoshitake Hiroaki

Classifications

• H01Q1/38 Primary

  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

• H01P5/12

  Coupling devices having more than two ports (H01P5/04 takes precedence) · CPC title

• H01Q21/0075

  Stripline fed arrays (H01Q21/065 takes precedence) · CPC title

• H01Q13/206

  Microstrip transmission line antennas · CPC title

• H01Q21/065

  Patch antenna array · CPC title