JPS57154911A - Double frequency band shared antenna - Google Patents

Double frequency band shared antenna

Info

Publication number
JPS57154911A
JPS57154911A JP4013181A JP4013181A JPS57154911A JP S57154911 A JPS57154911 A JP S57154911A JP 4013181 A JP4013181 A JP 4013181A JP 4013181 A JP4013181 A JP 4013181A JP S57154911 A JPS57154911 A JP S57154911A
Authority
JP
Japan
Prior art keywords
band
vhf
reflector
conductor
half wavelength
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
Application number
JP4013181A
Other languages
Japanese (ja)
Inventor
Takashi Kataki
Yoshihiro Honma
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP4013181A priority Critical patent/JPS57154911A/en
Publication of JPS57154911A publication Critical patent/JPS57154911A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/40—Imbricated or interleaved structures; Combined or electromagnetically coupled arrangements, e.g. comprising two or more non-connected fed radiating elements
    • H01Q5/45—Imbricated or interleaved structures; Combined or electromagnetically coupled arrangements, e.g. comprising two or more non-connected fed radiating elements using two or more feeds in association with a common reflecting, diffracting or refracting device

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Aerials With Secondary Devices (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)

Abstract

PURPOSE:To reduce the side lobe level at the S band, by forming a feeding element of a cross dipole antenna for a ground station that tracks a rocket, etc. and a linear conductor which functions as a reflector into a mesh which is >=half wavelength at the S band and <=half wavelength at the VHF band respectively. CONSTITUTION:For an S/VHF shared antenna, the electric wave sent from a primary radiator 1 of the S band is reflected by a secondary reflector 2 and a main reflector 1. A cross dipole antenna 4 which functions as a primary radiator of the VHF band is attached to the reflector 2, and a reflector 3 is shared by both S and VHF bands. A linear conductor 8 which is formed by the wire netting with a round section for example is used for the antenna 4. The mesh of the conductor 8 is set at >=half wavelength at the S band and at <=half wavelength at the VHF band respectively. As a result, the conductor 8 is substantially transparent to the electric wave of the S band and functions virtually as a conductor plate to the electric wave of the VHF band. Thus the side lobe level can be improved for a secondary radiation pattern of the S band.
JP4013181A 1981-03-19 1981-03-19 Double frequency band shared antenna Pending JPS57154911A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4013181A JPS57154911A (en) 1981-03-19 1981-03-19 Double frequency band shared antenna

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4013181A JPS57154911A (en) 1981-03-19 1981-03-19 Double frequency band shared antenna

Publications (1)

Publication Number Publication Date
JPS57154911A true JPS57154911A (en) 1982-09-24

Family

ID=12572246

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4013181A Pending JPS57154911A (en) 1981-03-19 1981-03-19 Double frequency band shared antenna

Country Status (1)

Country Link
JP (1) JPS57154911A (en)

Similar Documents

Publication Publication Date Title
ES8501925A1 (en) Coaxial dipole antenna with extended effective aperture.
EP0398554A3 (en) Multiband gridded focal plane array antenna
JPS5479542A (en) Parabolic elliptical antenna reflector having elliptical main lobe radiation pattern
JPS5643803A (en) Antenna power feeding system
GB1513521A (en) Selective gain reduction antenna
GB1291275A (en) Log-periodic antenna array having closely spaced linear elements
GB1163156A (en) Improvements in or relating to Paraboloidal Antennae with Counter-Reflectors.
JPS57154911A (en) Double frequency band shared antenna
JPS5773506A (en) Common antenna for multifrequency band
FR2368836A1 (en) SWITCHABLE MULTI-BEAM RADIO-ELECTRIC HYPERFREQUENCY TRANSMISSION DEVICE
JPS5423449A (en) Electronic scanning reflector antenna
JPS5720002A (en) Short backfire antenna
JPS57154909A (en) Frequency band shared antenna
JPS57154910A (en) Frequency band shared antenna
JPS5765901A (en) Radome
GB2251338A (en) Microwave absorber
JPS5647106A (en) Multihorn shaped-beam antenna
JPS55128904A (en) Side lobe reducing antenna
SE8100358L (en) POLARIZATION DISTURBING REFLECTOR FOR WHITE DIFFERENT FREQUENCY BANDS AND ANTENNA WITH SUCH REFLECTOR
JPS57112106A (en) Glass antenna
JPS5345150A (en) Dividing antenna device
JPS555521A (en) Low side lobe antenna unit
JPS5733804A (en) Reflector antenna
JPS5537076A (en) Antenna device
FR2521354B1 (en) MONOPULSE VHF ANTENNA WITH INTERFERENCE ELIMINATION