3121D Dipole
Frequency Range: 30 MHz – 1 GHz
The 3121D tuned dipole antenna’s behaviour approaches the theoretically perfect half-wavelength resonant dipole.
ETS-Lindgren’s dipole offers an accurate standard for precise EMI measurements including FCC and EN compliance testing, site attenuation as described in EN55022 and ANSI C63.4, and antenna calibration as described in ANSI C63.5.
Each 3121D dipole is individually calibrated at 10 metres per ANSI C63.5, using the preferred three antenna method. All measurement equipment used is NIST traceable.
These measurements are made without the use of attenuators, so antenna factors are a true presentation of actual performance. A printout of the calibration data of each antenna is included with the Manual and is also archived.
Four baluns (DB1-4) are supplied, the specifications are shown below:
|
Model |
Frequency |
Connectors |
Maximum Continuous Power |
|
Balun 1 |
30 MHz – 60 MHz |
Type N (f) |
260 W |
|
Balun 2 |
60 MHz – 140 MHz |
Type N (f) |
160 W |
|
Balun 3 |
140 MHz – 400 MHz |
Type N (f) |
80 W |
|
Balun 4 |
400 MHz – 1 GHz |
Type N (f) |
50 W |
Electrical Specifications
| Frequency Minimum | 30 MHz |
| Frequency Maximum | 1 GHz |
| Impedance (Nominal) | 50 Ω |
| Maximum Continuous Power | 50W-260W |
| Pattern Type | omnidirectional |
| Polarization | linear |
| VSWR | <1.6:1 |
