Groups of transmitters and receivers at a base station are coupled into a single antenna with a multicoupling network thus greatly improving station efficiency.
By providing appropriate filters we achieve a high degree of isolation between tranmitter and receiver thus obtaining the required selectivity with low insertion loss.
We provide a wide range of products built with mechanical cavities. The products include band reject, band pass notch filters and combiners both in the VHF and UHF frequency range.
The combiners are implemented assembling cavities of different size. The used configurations are starpoint, manifold and double bridge.
The cavities used in the VHF range are:
| VHF 085 | Rectangular 085 Cavity | 85 x 216 mm. (double) | AST-1506 |
|---|---|---|---|
| VHF120 | Rectangular 120 Cavity | 108 x 122 mm. | AST-1034 |
| VHF165 | Rectangular 165 Cavity | 165 x 210 mm. | AST-1360 |
| VHF 180 | Rectangular 180 Cavity | 108 x 165 mm. | AST-1023 |
| VHF 210 | Square 210 Cavity | 210 x 210 mm. | AST-0610 |
| VHF 280 | Rectangular 280 Cavity | 280 x 210 mm. | AST-1003 |
| VHF 100 | Round 100 | 120 mm. diameter | AST-0108 |
| VHF 200 | Round 200 | 200 mm. diameter | AST-0152 |
The cavities used in the UHF range are:
| UHF120 | Rectangular 120 Cavity | 108 x 122 mm. | AST-1052 |
|---|---|---|---|
| UHF 210 | Square 210 Cavity | 210 x 210 mm. | AST-1193 |
| UHF 280 | Rectangular 280 Cavity | 280 x 210 mm. | AST-1111 |
| UHF 100 | Round 100 | 120 mm. diameter | AST-0149 |