Tunable microwave devices with auto-adjusting matching circuit

Abstract

An embodiment of the present invention provides a power amplifier, comprising tunable impedance matching circuit including a plurality of tunable dielectric varactors and a DC voltage source interface capable of providing voltage to said plurality of saud tunable dielectric varactors.

1 . An apparatus, comprising: 
 a phase shifter; and    a matching network coupled to said phase shifter, said matching network including a plurality of voltage tunable dielectric varactors.    
     
     
         2 . The apparatus of  claim 1 , wherein said phase shifter is a tunable phase shifter.  
     
     
         3 . The apparatus of  claim 2 , further comprising a voltage source supplied to said phase shifter and said matching network.  
     
     
         4 . The apparatus of  claim 1 , wherein said voltage source supplying said phase shifter and wherein said voltage source supplying said matching network is controlled by two different external DC voltage sources.  
     
     
         5 . The apparatus of  claim 1 , further comprising a load coupled to said phase shifter, wherein the impedance of said matching network changes to maximize power transfer to and from said phase shifter.  
     
     
         6 . The apparatus of  claim 1 , wherein said voltage-tunable dielectric varactor includes a layer comprising Barium strontium titanate of the formula BaxSr1−xTiO3 where x can be any value from 0 to 1, thereby enabling the capability of operation in the frequency range between 500 MHz to 40 GHz.  
     
     
         7 . A method, comprising: 
 coupling a phase shifter to a matching network, said matching network including a plurality of voltage tunable dielectric varactors and wherein said voltage-tunable dielectric varactor includes a layer comprising Barium strontium titanate of the formula BaxSr1−xTiO3 where x can be any value from 0 to 1, thereby enabling the capability of operation in the frequency range between 500 MHz to 40 GHz    
     
     
         8 . The method of  claim 7 , wherein said voltage source supplying said phase shifter is controlled by two different external DC voltage sources.