Aircraft antenna 20-21

radarmicrowave

Type 20-21 is a radar altimeter patch antenna (RADALT). The antenna is designed to exhibit the electrical characteristics of ARINC 707 and is a conformal design. The antenna operates with a broadside linear polarisation coverage in the Radar Altimeter (RADALT) band to allow transmission and reception of microwave signals from two adjacent antennas. Conformal Lightweight Isolation ≤ 75dB at 20 inch spacing Beam width ≤40 deg (H-plane), ≤45 deg (E-plane) Side Lobe < -40dB Minimum Frequency 4200 Maximum Frequency 4400 Impedence 50 Return Loss VSWR 4200 - 4400 MHz: <2.0:1 (Max) Gain +10 dBiL Polarization Vertical Radiation Pattern Azimuth Omnidirectional Average Power Watts 5 Full Dimensions LxWxH mm 93 x 89 x 4.3 Mass kg 0.11 Connector Type TNC Type Female