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ADRF5031 Recommended for New Designs
The ADRF5031 is a nonreflective, SPDT switch manufactured using the silicon on insulator (SOI) process. The ADRF5031 operates from 9 kHz to 20 GHz with...
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ADRF5031 on Analog.com

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					    re27v
					
							

            
            			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Apr 17, 2025 
				
			
			
		
    
		
		                    	    
    
        	    
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                The user inquires about using the ADRF5031 RF switch above its specified 20 GHz frequency, despite higher insertion loss. The final answer confirms that operation beyond 20 GHz is not guaranteed but possible with increased loss. The ADRF5023 is suggested as a more suitable option, specified up to 40 GHz with better insertion loss at 25 GHz, though it is more expensive. Additional options like ADRF5025 and ADRF5049 are also mentioned, covering the 20 MHz to 25 GHz range with higher power handling.
                        	    
    
                
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    Category: Hardware
    
    		        		            		    
    Product Number:  ADRF5031  
    
    		        		    		    
    
		    		    
		    			
    
			    
    I am looking for a RF switch which can handle +28dBm maximum CW power, non-reflective, SPDT with Bandwidth of 20MHz to 25GHz.
    

    I noticed the ADRF5031 is specified for 9kHz to 20GHZ however in the given figures if I use it up to 25ghz means that I am just accepting a larger loss at higher frequencies, which for my application is suitable.
    

    

    My question is: since the part is only advertised as 9kHz to 20GHZ is there a reason why it could not be used above 20GHz which I am missing? Secondly do you have a more suitable SPDT switch for such application?
    
			
    
			
									
		                             
                        

    
    
                                            
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      •  Analog Employees  
      
            
						
                            
            
            				
            
                on Apr 28, 2025 9:14 AM
            
            
						
			            		
      
		
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      ADRF5031 will work fine at 25 GHz; it will just have higher insertion loss as you note. There are some other switches to consider. ADRF5025 and ADRF504  cover your frequency range and can accept input power levels up to 27 dBm.   ADRF5049 and ADRF5023 work to 45 GHz and can handle input powers of 30 dBm. 
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
						
				
				
				
		
		
      
			
		
      
	
      

      

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                on May 1, 2025 5:24 AM
            
            
												
						in reply to enash
					
										
			            		
        
		
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        Okay, my question was around why it is only marketed up to the 20GHz? I thought there would be some insight or some specific reason which I am missing.
        

        I also noticed the ADRF5023 however it seems to have similar specs for double the cost for my frequency range
        
			
        

		
			
	      

		
		
	
        
	
        
		
        
			
		
        
	
        
	
        
		
						
						
				
				
				
				
		
		
        
			
		
        
	
        

        

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        •  Analog Employees  
        
            
						
                            
            
            				
            
                on May 1, 2025 7:42 AM
            
            
												
						in reply to re27v
					
										
			            		
        
		
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        We often include plots of device operation that go beyond the specified frequency range for informational purposes. When we release a device like this, we make a call on what to set as the max specified frequency. In this case, it happens to be the frequency at which the insertion loss starts to exceed -1dB. Operation beyond 20 GHz is not guaranteed. So while it's unlikely to happen, if you bought an ADRF5031  device from us that turned out to have an insertion loss of -1dB at 20 GHz and -1.75 dB at 25 GHz, we would call that device spec-compliant. 
        

        ADRF5023 costs more because it is specified to operate to 40 GHz. Also, its typical insertion loss at 25 GHz is a few tenths of a dB better than ADRF5031.  
        
			
        

		
			
	      

		
		
	
        
	
        
		
        
			
		
        
	
        
	
        
		
						
						
						
				
				
				
		
		
        
			
		
        
	
        

        

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