JPS6474804A - Microwave antenna with ask modulator - Google Patents

Microwave antenna with ask modulator

Info

Publication number
JPS6474804A
JPS6474804A JP23303687A JP23303687A JPS6474804A JP S6474804 A JPS6474804 A JP S6474804A JP 23303687 A JP23303687 A JP 23303687A JP 23303687 A JP23303687 A JP 23303687A JP S6474804 A JPS6474804 A JP S6474804A
Authority
JP
Japan
Prior art keywords
antenna
center part
microwave
wave
current
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
JP23303687A
Other languages
Japanese (ja)
Inventor
Kenji Omiya
Yasuyuki Kondo
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.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP23303687A priority Critical patent/JPS6474804A/en
Publication of JPS6474804A publication Critical patent/JPS6474804A/en
Pending legal-status Critical Current

Links

Landscapes

  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Waveguide Aerials (AREA)
  • Transmitters (AREA)

Abstract

PURPOSE:To realize miniaturization and light weight, by integrating a modulator part to turn ON/OFF a microwave by an amplitude modulation signal with the antenna of a microstrip line. CONSTITUTION:In the antenna 1 of microstrip, a microwave signal is fed between the center part of one side 11a of a conductor pattern 11 of four sides whose side length is around 1/2-wave and the equivalent part 12a of a ground conductor 11b which corresponds to the center part. Also, an impedance control element 2 is connected between the center part of the confronting side 11b of the side 11a and the equivalent part 12b of the ground conductor 12 which corresponds to the center part. By turning ON/OFF current I from a bias power source 3 to be added on the element 2 by the amplitude modulation signal, all of the microwave signals fed to the antenna 1 are terminated at the impedance resistor R of the element 2 when the current I flows, thereby, it is not radiated to the space as a wave. Also, when the current I is cut off, the microwave signal is radiated from the antenna 1 as the wave. Therefore, the antenna 1 becomes the antenna with a modulation function.
JP23303687A 1987-09-17 1987-09-17 Microwave antenna with ask modulator Pending JPS6474804A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP23303687A JPS6474804A (en) 1987-09-17 1987-09-17 Microwave antenna with ask modulator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP23303687A JPS6474804A (en) 1987-09-17 1987-09-17 Microwave antenna with ask modulator

Publications (1)

Publication Number Publication Date
JPS6474804A true JPS6474804A (en) 1989-03-20

Family

ID=16948801

Family Applications (1)

Application Number Title Priority Date Filing Date
JP23303687A Pending JPS6474804A (en) 1987-09-17 1987-09-17 Microwave antenna with ask modulator

Country Status (1)

Country Link
JP (1) JPS6474804A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009044647A (en) * 2007-08-10 2009-02-26 Denso Wave Inc Portable rfid-tag reader

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009044647A (en) * 2007-08-10 2009-02-26 Denso Wave Inc Portable rfid-tag reader

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