3117 Double-Ridged Guide Antenna
rfFrequency Range: 1 GHz – 18 GHz
The Model 3117 Double Ridged Waveguide is the latest addition to a family of double ridge waveguides for microwave and EMC measurement from ETS-Lindgren. This model corrects the lower gain at the upper end of the frequency range, commonly found in ridged waveguide antennas. Users of this antenna benefit from uniform illumination of target surfaces and accurate gain measurement. In addition, the Model 3117 exhibits high gain and low VSWR across its operational frequency band, accepting moderate power input of 300 watts.
The Model 3117 maintains a single main lobe pattern in the direction of the horn axis over its frequency range. This characteristic is essential for even distribution of electromagnetic energy on a target surface, and accurate measurement of gain and vector information. The Model 3117’s unique design suppresses the propagation of high order modes. The result is an antenna with a well-defined single lobe radiation pattern that outperforms other antennas in its class.
Electrical Specifications
| Frequency Minimum | 1 GHz |
| Frequency Maximum | 18 GHz |
| Connectors | Type N |
| Impedance (Nominal) | 50 Ω |
| Maximum Continuous Power | 300 W |
| Pattern Type | directional |
| Peak Power | 400 W |
| Polarization | linear |
| VSWR | 3.5:1 max <2:1 above 1.5 GHz |
Standard Configuration
- Antenna Assembly
- Mounting bracket drilled to accept ETS-Lindgren or other tripod mounts with 1/4 in x 20 threads
- Rear “Stinger” Mount
- Individually calibrated at 1 m per SAE ARP 958 at our A2LA accredited lab. 3 m calibration per ANSI C63.5 available at additional cost. Actual antenna factors and a signed Certificate of Calibration Conformance included with manual.
