RADALT Patch Antenna – 20-21

20-21 Datasheet

RADALT Patch Antenna – 20-21

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
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Specification

4200 Minimum Frequency
4400 Maximum Frequency
50 Impedence
4200 - 4400 MHz: <2.0:1 (Max) Return Loss VSWR
+10 dBiL Gain
Vertical Polarization
Omnidirectional Radiation Pattern Azimuth
5 Average Power Watts
93 x 89 x 4.3 Full Dimensions LxWxH mm
0.11 Mass kg
TNC Type Female Connector Type
50000 Altitude ft
55 Continuous Operating Temperature Min - C
70 Continuous Operating Temperature Max C
RTCA DO-160C, Section 8, Curve C Vibration
DO-160 Standards
20-21 Datasheet