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ADAR1000 Recommended for New Designs
The ADAR1000 is a 4-channel, X and Ku frequency band, beamforming core chip for phased arrays. This device operates in half-duplex between receive and...
ADAR1000 on Analog.com

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Out of band performance

		
	
				

			

									
					    UxoxY2
					
							

            
            			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Jul 30, 2025 
				
			
			
		
    
		
		                    	    
    
        	    
    Thread Summary
    
                The user inquired about using the ADAR1000 for phase shifting and attenuation at 1 GHz, despite its 8-16 GHz range. The final answer suggests using individual vector modulators or a combination of analog/digital phase shifters and attenuators for 1 GHz signals. For unformed signals, an IQ modulator like the ADL5375 or a complete transceiver like the AD9361 or ADRV9009 is recommended. The accompanying answers note that the ADAR1000's performance degrades significantly at 1 GHz, and synchronization of multiple AD9361 devices requires more than just a common clock, as detailed in a specific thread.
                        	    
    
                
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    Category: Hardware
    
    		        		            		    
    Product Number:  ADAR1000  
    
    		        		    		    
    
		    		    
		    			
    
			    
    Hi!
    

    Does anyone know what the out of band performance for the ADAR1000 is? Essentially, this is 8-16GHz part. If you were to attempt to use it lower in frequency, let's say 1GHz, could you still use the attenuators and phase shifters? I understand you would be limited by total phase shift, but could you use this to basically fine-tune a lower frequency phase? Attenuation is probably easier, right? That might be less dependent on frequency?
    

    Thanks!
    
			
    
			
									
		                             
                        

    
    
                                            
                 Phase Shifters
                
                                                    
                 hardware
                
                                                    
                 adar1000
                
                                                    
                 Beamformers
                
                                                    
                 and Vector Modulators
                
                                
            
    
    
    
		
    

				
				        
        		
    
			
						
									
												
			
			
                        
                                    
                        
                                                    
                        
            
			            
						
						
			
			
			
			
		
    

        
        
        
    
					
    
			
    


    
















    
	
    
	
    
					



			








	
	
	
	



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                on Aug 1, 2025 12:55 PM
            
            
						
			            		
        
		
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        So for lower frequency arrays, does anyone have a suggestion for individual antenna element attenuation/phase control? It would seem to me the only option would be to use discrete phase shifters and VVAs... But this is not my area of expertise. For very large arrays, is it primarily a game of analog splitting/combining and individual antenna gain/phase control or would a better approach be putting a IQ capable source at each element and do the same with IQ impairments with a shared LO?
        
			
        

		
			
	      

		
		
	
        
	
        
		
        
			
		
        
	
        
	
        
		
						
						
				
				
				
				
		
		
        
			
		
        
	
        

        

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                on Aug 1, 2025 12:55 PM
            
            
						
			            		
          
		
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          So for lower frequency arrays, does anyone have a suggestion for individual antenna element attenuation/phase control? It would seem to me the only option would be to use discrete phase shifters and VVAs... But this is not my area of expertise. For very large arrays, is it primarily a game of analog splitting/combining and individual antenna gain/phase control or would a better approach be putting a IQ capable source at each element and do the same with IQ impairments with a shared LO?
          
			
          

		
			
	      

		
		
	
          
	
          
		
          
			
		
          
	
          
	
          
		
						
						
				
				
				
				
		
		
          
			
		
          
	
          

          

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