JPS6418303A - Primary radiator shared for two frequencies - Google Patents
Primary radiator shared for two frequenciesInfo
- Publication number
- JPS6418303A JPS6418303A JP17565987A JP17565987A JPS6418303A JP S6418303 A JPS6418303 A JP S6418303A JP 17565987 A JP17565987 A JP 17565987A JP 17565987 A JP17565987 A JP 17565987A JP S6418303 A JPS6418303 A JP S6418303A
- Authority
- JP
- Japan
- Prior art keywords
- waveguide
- polarized wave
- wave
- polarized
- beam width
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Aerials With Secondary Devices (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
PURPOSE:To sufficiently suppress the side lobe of each polarized wave by providing a monopole antenna whose length is 1/4 of the wavelength of each polarized wave, a circular flange and a metallic ridge so as to set the beam width of each polarized wave respectively to an optimum beam width. CONSTITUTION:Metallic ridges (for f1)3 and (for f2) 4 of a prescribed shape are provided on the inner wall of a circular waveguide 1 in crossing with a polarized face orthogonal to the guide axis of the waveguide 1 and a circular flange 2 is provided on the aperture of the waveguide 1. Then monopole antennas 5, 6 whose length is 1/4 wavelength of each polarized wave are provided on a position at a 1/4 wavelength of the polarized waves (f1, f2) from the inner wall of the waveguide 1. Then the antennas 5, 6 are excited by the induced current induced in the flange 2 and radiate a wave, and the electromagnetic field of re-radiation cancels the radiated electromagnetic field of the waveguide 1 at a broad region of the radiated electromagnetic wave of the waveguide 1. Thus, the beam width of each polarized wave is set respectively to the optimum beam width so as to suppress the side lobe of each polarized wave.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17565987A JPS6418303A (en) | 1987-07-14 | 1987-07-14 | Primary radiator shared for two frequencies |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17565987A JPS6418303A (en) | 1987-07-14 | 1987-07-14 | Primary radiator shared for two frequencies |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6418303A true JPS6418303A (en) | 1989-01-23 |
Family
ID=15999968
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP17565987A Pending JPS6418303A (en) | 1987-07-14 | 1987-07-14 | Primary radiator shared for two frequencies |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6418303A (en) |
-
1987
- 1987-07-14 JP JP17565987A patent/JPS6418303A/en active Pending
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