Transponder, including transponder system

Abstract

In a transponder ( 19 ) for amplification of a received signal ( 60 ) into an antenna ( 1 ), to a signal ( 61 ) for retransmission, and where the retransmitted signal ( 61 ) possibly may have information superimposed, a quenched oscillator ( 5 ) is incorporated as amplifying element. The oscillator ( 5 ) is preferably of superregenerative type and exhibits negative resistance ( 30 ) for the received signal ( 60 ). Transponders according to the present invention may be introduced as system elements in a wireless or wire based network to work as intelligent or unintelligent connections in the network. The transponders can also be used in positioning systems.

1 . The repeater or transponder of super regenerative, analogue type with any of very large dynamic range and very wide bandwidth and band-pass filter characteristic, were the repeater or transponder may receive external synchronization of internal quenching system, and where selectivity requirements are adapted to any of information bandwidth and quench frequency, wherein two or more gain blocks each consisting of quenched oscillator or quenched amplifier interconnected in cascaded or parallel fashion to work as one amplifier, using internal quench synchronization, and transponder being adapted to conform with selectivity requirements.  
   
   
       2 . The repeater or transponder of regenerative, analogue type with any of large dynamic range and wide bandwidth and band-pass filter characteristic, and where selectivity requirements are adapted to the information bandwidth, wherein two or more gain blocks each consisting of quenched oscillator or quenched amplifier interconnected in cascaded or parallel fashion to work as one amplifier, using non-synchronized or internally synchronized low frequency quenching, and transponder being adapted to conform with selectivity requirements.  
   
   
       3 . A positioning system utilising repeaters or transponders, based on radio propagation or man made infrastructure, said system comprising at least one of at least one repeater and at least one transponder arranged mainly to maintain positioning accuracy, coverage and range and each having at least one port for connection via signal coupler arrangements to a transmission medium, where each repeater/transponder is of analogue type with positive and large signal gain and implemented using any of solid state components and at least one solid state integrated circuit, and arranged so that no or moderate coupling isolation is required between input signal and output signal based on high frequency carriers using any type of modulation and using any communication protocol, and where selectivity requirements are adapted to any of information bandwidth and measurement bandwidth, wherein the repeaters and transponders are of regenerative type equipped with selectivity arrangements for both input and output signals, whereby band-pass analogous characteristics of the repeaters and transponders are adapted to conform with selectivity requirements.  
   
   
       4 . The positioning system according to  claim 3 , wherein any repeater/transponder represents a two- or three dimensional point of any of a target and a user end of the system.  
   
   
       5 . The positioning system according to  claim 3 , wherein any repeater/transponder represents a two- or three dimensional point of a relay between any of a target and a user and any of a baseline and base station of the system.  
   
   
       6 . The positioning system according to  claim 3 , wherein any repeater/transponder is capable of being at any of a base line and a master station of the system.  
   
   
       7 . The positioning system according to  claim 3 , wherein any repeater/transponder constitute any of a synthetic aperture and a synthetic baseline of the system which is any navigation or positioning system including GPS.  
   
   
       8 . The positioning system according to  claim 3 , wherein any repeater/transponder is capable of being at least one of detection and identification targets of the system.  
   
   
       9 . The positioning system according to  claim 3 , wherein any repeater/transponder has a target beacon function in the system.  
   
   
       10 . The positioning system according to  claim 3 ,  
     wherein any repeater/transponder constitutes any of a confusion target and a confusion source in military ECM homing, positioning and jamming scenarios.