Method of operating a solid state power amplifying device

Abstract

According to one embodiment, a circuit is disclosed. The circuit comprises a solid state power amplifying device, an input impedance matching circuit and an output impedance matching circuit coupled to the solid state amplifying device. The input impedance matching circuit includes an input pitchfork trace pattern. The output impedance matching circuit includes an output pitchfork trace pattern. The circuit further discloses an input bias circuit and an output bias circuit.

What is claimed is:  
     
         1 . A method of enhancing the performance of a solid state power amplifying device, the method comprising: 
 controlling the distribution of an electromagnetic field across a single wide input lead of the solid state power amplifying device by using a first component comprised of a plurality of narrow transmission lines coupled to the input lead of the solid state power amplifying device.    
     
     
         2 . The method of  claim 1  further comprising compensating for the distribution of an electromagnetic field across a single wide output lead of the solid state power amplifying device by using a second component comprised of a plurality of narrow transmission lines coupled to the output lead of the solid state power amplifying device.  
     
     
         3 . The method of  claim 1  further comprising coupling a resistor within one or more of the plurality of narrow transmission lines.  
     
     
         4 . The method of  claim 1  further comprising coupling a resistor between two or more of the plurality of narrow transmission lines.  
     
     
         5 . The method of  claim 1  wherein the solid state power amplifying device is a bipolar junction transistor (BJT).  
     
     
         6 . The method of  claim 1  wherein the solid state power amplifying device is a heterojunction bipolar transistor (HBT).  
     
     
         7 . The method of  claim 1  wherein the solid state power amplifying device is a lateral diffused metal oxide semiconductor field effect transistor (LDMOS FET).  
     
     
         8 . The method of  claim 1  wherein the solid state power amplifying device is a vertical diffused metal oxide semiconductor field effect transistor (DMOS FET).  
     
     
         9 . The method of  claim 1  wherein the solid state power amplifying device is a metal semiconductor field effect transistor (MES FET).  
     
     
         10 . The method of  claim 1  wherein the solid state power amplifying device is a pseudomorphic high electron mobility field effect transistor (PHEMT FET).  
     
     
         11 . The method of  claim 1  wherein the solid state power amplifying device is a static inductance transistor (SIT).  
     
     
         12 . An amplification circuit comprising: 
 a solid state power amplifying device; and    a first component, coupled to a single wide input lead of the solid state power amplifying device, having a plurality of narrow transmission lines that control the distribution of an electromagnetic field across the input lead of the solid state power amplifying device.    
     
     
         13 . The circuit of  claim 12  further comprising: 
 an output lead coupled to the output of the solid state power amplifying device; and  
 a second component, coupled to the single wide output lead of the solid state power amplifying device, having a plurality of narrow transmission lines that compensate for the distribution of an electromagnetic field across the output lead of the solid state power amplifying device.  
 
     
     
         14 . The circuit of  claim 12  further comprising a resistor coupled within one or more of the plurality of narrow transmission lines of the first component.  
     
     
         15 . The circuit of  claim 12  further comprising a resistor coupled between two or more of the plurality of narrow transmission lines of the first component.  
     
     
         16 . The circuit of  claim 12  further comprising: 
 a radio frequency source coupled to the input of the first component; and  
 a load coupled to the output of the second component.  
 
     
     
         17 . The circuit of  claim 16  further comprising an output bias circuit coupled to the solid state power amplifying device.  
     
     
         18 . The circuit of  claim 17  wherein the output bias circuit comprises a transient voltage suppressor.  
     
     
         19 . The circuit of  claim 12  wherein the solid state power amplifying device comprises a lateral diffused metal oxide semiconductor field effect transistor (LDMOS FET).  
     
     
         20 . The circuit of  claim 12  wherein the solid state power amplifying device comprises a vertical diffused metal oxide semiconductor field effect transistor (DMOS FET).  
     
     
         21 . The circuit of  claim 12  wherein the solid state power amplifying device is a metal semiconductor field effect transistor (MES FET).  
     
     
         22 . The circuit of  claim 12  wherein the solid state power amplifying device is a pseudomorphic high electron mobility field effect transistor (PHEMT FET).  
     
     
         23 . The circuit of  claim 12  wherein the solid state power amplifying device is a static inductance transistor (SIT).  
     
     
         24 . The method of  claim 12  wherein the solid state power amplifying device is a bipolar junction transistor (BJT).  
     
     
         25 . The method of  claim 12  wherein the solid state power amplifying device is a heterojunction bipolar transistor (HBT).