The Bell System Technical Journal 



Vol. XXVI Oclober, 1947 No. ./ 



The Radar Receiver 



By L. W. MORRISON, JR- 

 Table of Coxtf.nts 



Introduction 694 



1. Radar Receiver Design Considerations 695 



1.1 The Military Radar System 695 



1 .2 Tlie I'linctioii of the Radar Receiver 696 



1.21 Characteristics of the Radar Receiver Input Signal 698 



1.22 Character of the Output of a Radar Receiver 701 



1 .3 Composition of the Radar Receiver 703 



2. Radar Receiver Component Design 706 



2.1 The Radar Receiver Input Circuit 706 



2.1 1 Input Signal Characteristics 707 



2.12 Input Circuit Noise Considerations 707 



2.13 1000-Mc Radio-Fref[uenc_\' Amplifier Design 709 



2.14 The Radar Converter 712 



2.15 The Radar Receiver Beat Oscillator 721 



2.16 Typical Radar Input Circuit Designs 725 



2.2 The Radar Intermediate Fref|uency .\mpiifier 731 



2.21 IF Amplifier Ref|uirements 731 



Hand Width 731 



Gain Characteristics 733 



Intermediate Midband Fre(|uenc\' 734 



The Second Detector 735 



2.22 IF Amplifier Input Circuit Design 735 



2.23 Interstage Circuit Design 739 



2.24 Second Detector Design 743 



2.25 Typical Component Designs 743 



2.3 The Radar Video .Vmplifier 749 



2.31 fiain-Fre(|uency Considerations 749 



2.i2 CJain-Amplitudc Considerations 751 



2.^?< D-c Restoration Methods 753 



2.34 T\])ical Radar Receiver Video Amplifier Circuits 755 



2.4 The Radar Indicator 757 



2.41 Classification of Radar Dis])la\' T\pes 757 



2.42 The Cathode-Ray Tube '. . .' 762 



Klectrostatic Deflection Txpe 763 



Magnetic Deflection Type 764 



Characteristics of the Fluorescent Screen 765 



2.43 ry])ical Radar Indicator Component Designs 767 



2.5' The Radar Sweep Circuit 773 



2.51 Function 773 



2.52 The Timing Wave Form (ienerator 776 



The Multivibrator 776 



Ty]3ical Timing Wave Circuits 779 



2.53 The Sweej) Wave Form Generator 781 



2.54 The Sweej) .\m|)lifier 784 



2.6 (Circuits fc^r Radar Range and Hearing Measurement 789 



2.61 Flectronic Hearing Marker Circuits 790 



2.62 Range Marker Circuits 792 



Fi.xed Range Markers 792 



693 



