[go: up one dir, main page]

JPS6481554A - Microwave communication equipment - Google Patents

Microwave communication equipment

Info

Publication number
JPS6481554A
JPS6481554A JP23920487A JP23920487A JPS6481554A JP S6481554 A JPS6481554 A JP S6481554A JP 23920487 A JP23920487 A JP 23920487A JP 23920487 A JP23920487 A JP 23920487A JP S6481554 A JPS6481554 A JP S6481554A
Authority
JP
Japan
Prior art keywords
carrier
modulation
nonmodulation
wave
ask
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.)
Granted
Application number
JP23920487A
Other languages
Japanese (ja)
Other versions
JPH0450784B2 (en
Inventor
Hideo Sugawara
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 JP23920487A priority Critical patent/JPS6481554A/en
Priority to EP88115700A priority patent/EP0308964B1/en
Priority to DE3889403T priority patent/DE3889403T2/en
Priority to US07/249,768 priority patent/US4926187A/en
Publication of JPS6481554A publication Critical patent/JPS6481554A/en
Publication of JPH0450784B2 publication Critical patent/JPH0450784B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Bidirectional Digital Transmission (AREA)

Abstract

PURPOSE:To attain small size, low cost and low power consumption for a slave set by allowing a master set to transmit a nonmodulation carrier as a circularly polarized wave signal at the same time in addition to a modulation wave being the result of modulating the carrier and allowing a slave set to modulate the signal by the nonmodulation carrier. CONSTITUTION:An ASK modulation oscillator 111 of a modulation section 11 of a master set generates a microwave carrier CW1 and applies ASK modulation by using a transmission data D1t from a data processing section 100 to the microwave carrier CW1 and outputs the ASK wave as the modulation wave P1mod to a transmission section 21 of the master equipment. Moreover, a nonmodulation carrier oscillator 112 generates a nonmodulation carrier CW2 and outputs it as it is to the transmission section 21. The transmission section 21 of the master equipment consists of a hybrid H of an orthogonal phase device 211 and a square patch antenna ANT of a transmission antenna 212 and sends the ASK wave and the carrier CW2 from the antenna ANT as microwaves Wa, Wb.
JP23920487A 1987-09-24 1987-09-24 Microwave communication equipment Granted JPS6481554A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP23920487A JPS6481554A (en) 1987-09-24 1987-09-24 Microwave communication equipment
EP88115700A EP0308964B1 (en) 1987-09-24 1988-09-23 Radio-frequency identification system
DE3889403T DE3889403T2 (en) 1987-09-24 1988-09-23 Identification system with radio frequencies.
US07/249,768 US4926187A (en) 1987-09-24 1988-09-26 Radio-frequency identification system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP23920487A JPS6481554A (en) 1987-09-24 1987-09-24 Microwave communication equipment

Publications (2)

Publication Number Publication Date
JPS6481554A true JPS6481554A (en) 1989-03-27
JPH0450784B2 JPH0450784B2 (en) 1992-08-17

Family

ID=17041282

Family Applications (1)

Application Number Title Priority Date Filing Date
JP23920487A Granted JPS6481554A (en) 1987-09-24 1987-09-24 Microwave communication equipment

Country Status (1)

Country Link
JP (1) JPS6481554A (en)

Also Published As

Publication number Publication date
JPH0450784B2 (en) 1992-08-17

Similar Documents

Publication Publication Date Title
DE60016966D1 (en) TRANSMISSION OF OVERLAPPING TIMES WITH PHASE-CONTROLLED GROUP ANTENNAS
AU7144291A (en) Bidirectional inductive data transmission
AU9001191A (en) A system and method for the non-contact transmission of data
JPS6481554A (en) Microwave communication equipment
JPS55161429A (en) Signal transmitting and receiving system
JPS55118241A (en) Telephone unit
JPS5573147A (en) Multi-carrier communication method
JPS5452914A (en) Elliptic polarized wave modulation control system
GB707520A (en) Radio modulators comprising variable reactors in aerial feed circuits
JP2000022578A (en) Transmission-reception system
JPS62208721A (en) wireless device
GB1060173A (en) Frequency diversity transmitting system
JPS5752244A (en) Transmission system
CN105680887A (en) Multiuser polarization modulation wireless communication transmitter
JPS5531356A (en) Interference wave offset circuit
JPS56136003A (en) Antenna device
JPS5779710A (en) Antenna device
JPS5530227A (en) Communication system
JPS6446178A (en) Data transfer system for semiconductor data carrier system
JPS5489516A (en) Radio communication system
JPS5672548A (en) Space diversity receiving system
GB1101066A (en) Electrical wave keyer
FILATOV et al. An antenna with a controllable radiation pattern in a horizontal plane(Waveguide polarizer for horizontal control of antenna radiation patterns)
JPS5728403A (en) Circular polarized wave generator
JPS5656047A (en) Repeating system for single-wave press-to-talk communication

Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees