DM H21-1 Antenna Coupler | Includes Marker Beacon Support

The H series antenna couplers are designed are designed to couple multiple receiver systems to a single antenna with minimum insertion loss. These antenna couplers allow signal from a single antenna to be split equally to either redundant systems or provide a dual function role, such as glide slope and VHF range localizer. The H series has a rugged construction built with an aluminum housing which fully encapsulate all circuit elements.

This H21 antenna coupler (H21-1) includes marker beacon support.

Features

• Instrument landing system redundant couplers
• Rugged, fully encapsulated designs
• Minimum insertion loss
• Standard mounting

Specifications

Weight:
4 oz

Frequency Range:
329 MHz – 335.3 MHz
108 MHz – 118 MHz
74.75 MHz – 75.25 MHz (H21-1 only)

VSWR:
< 1.5:1 dB (VOR/LOC)
< 1.5:1 dB (Glide Slope)
< 2.0:1 dB (marker beacon), H21-1 only

Impedance:
50Ω

Isolation:
< 20 dB (VOR/LOC to VOR/LOC)
< 40 db (VOR/LOC to VOR/LOC)
< 14 dB (Glide slope from VOR/LOC)
< 14 dB (marker beacon to marker beacon)

Insertion Loss:
0.5 dB, max (glide slope port H22-1 & H23-1)
0.5 dB, max (VOR/LOC port H22-1)
3.5 dB, max including power split (VOR/LOC ports, H21-1, H23-1 and glide slope ports H24-1)
3.6 dB, max (Marker beacon ports, H21-1)

Power Handling:
receive only

Approvals:
FAA TSO C34c, TSO C35d, TSO C36d, TSO C40c