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The antennas mounted on satellites play a key role in transmitting data (telemetry) to, and receiving data (commands) from, ground control systems through radio communications.
NEC has a good record of supplying on-board antennas in various forms, frequencies and diameters.
| Program | Antenna Type | Frequency | Size | Customer | Status | Launch |
|---|---|---|---|---|---|---|
| BS-2a / 2b, ETS-V, JERS-1, ETS-VI |
Omni antenna | S | ø 106 mm | NASDA | Flight Proven | 1982-1994 |
| ETS-III, EYS-V | Horn antenna | C | ø 220 mm | NASDA | Flight Proven | 1982, 1987 |
| BS-2a / 2b | Offset parabola | Ku | 1590 x 1030 mm | NASDA | Flight Proven | 1984 / 1986 |
| BS-3a / 3b | Offset parabola | Ku | 1.7 x 0.8 m | NASDA | Flight Proven | 1990 / 1991 |
| ETS-VI | Casegrain | Ka | 0.8 m | NASDA | Flight Proven | 1994 |
| Offset casegrain | 3.5 m | NTT | Flight Proven | 1994 | ||
| TRMM | W / G SLOT | Ku | 2.1 x 2.1 m | NASDA, CRL | Flight Proven | 1997 |
| MUSES-B | Parabola | Ku | 0.5 m | ISAS | Flight Proven | 1997 |
| ETS-VII | Parabola | S | 1.3 m | NASDA | Flight Proven | 1997 |
| PLANET-B | Parabola | X | 1.6 m | ISAS | Flight Proven | 1998 |
| COMETS | Offset casegrain with multihorn feeder | Ka | 2.3 m | NASDA | Flight Proven | 1998 |
| Ka, Q | 2.3 m | |||||
| DRTS | Offset parabola | Ka | 2 m | NASDA | Flight Proven | 2002 |
| ALOS | Deployable plane phased arrey | L | 8.9 x 3.5 m | JAXA | Flight Proven | 2006 |
| ETS-VIII | Large deployable phased array | S | 13 m | JAXA, ASC | Flight Proven | 2006 |
| Parabola with dual frequency feeder | L / S | 1 m | JAXA | |||
| Offset parabola | Ka | 0.8 m | JAXA |
| Program | COMETS |
|---|---|
| Type | Offset Cassegrain Antenna with Multi-horn Feeder |
| Aperture | 2.3 m ø |
| Frequency | Ka-band |
| Number of Beams | 2 |
| Coverage Gain | 4 4dBi |
| Program | ETS-VI |
|---|---|
| Type | Casegrain Antenna with Gimbal |
| Aperture | 0.8 m ø |
| Frequency | Ka - band |
| Scan Angle | ± 10 deg |
| Program | BS-2a, BS-2b |
|---|---|
| Type | Offset Parabola Antenna |
| Aperture | 1590 x 1030mm Ellipsoid |
| Frequency | 11.9 to 14.3 GHz |
| Polarization | RHCP |
| Gain | 37 dBi Japan Main Islands, 28dBi Japan All Islands |
| Program | BBM for Broadcasting Satellite |
|---|---|
| Aperture | 1.2 m ø ( 1 / 2 Scale Model) |
