18 - 42 GHz Spiral Antennas
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The QSPCP18-42K ultra wide-band 18 - 42 GHz circular polarised spiral antenna is ideal for EW radar detection and direction finding due to its broad beamwidth and low squint and axial ratio. Its compact size combined with its wideband performance and either left or right hand circular polarisation capability makes this antenna extremely versatile.
Model Number QSPCP18-42K
This antenna is in production, however, there is a continuing development project for this antenna and other frequency variants, please contact us for the latest specifications and any special requirements.
Due to the constant phase centre and wide bandwidth of the spiral antenna, it is ideally suited for use as a reflector feed. The purity of the circular polarization is also very good.
Features
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Applications include electronic surveillance, direction finding and reflector feeds requiring little phase centre variation with frequency
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Gain -1.5 to 2.5 dBiL over band
- Supplied with or without a mounting flange
- Stable antenna patterns provide consistent and repeatable performance
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Compact, Lightweight and Rugged construction enhance usability
- Excellent Axial Ratio : < 2 dB across the whole band
- A full antenna test report including gain against frequency is provided with
each antenna
Contact us to
discuss your particular needs
Specification
Specifications are liable to change and improve as development work continues.
Please check back to this website and/or RSS feeds and Q-par E-news for updated details.
| Frequency | 18 - 42 GHz |
| Nominal Gain | -1.5 to 2.5 dBiL |
| 3 dB Beamwidth | Typically 50 - 110° |
| VSWR | < 1.5 : 1, Max. VSWR 2.4 : 1 |
| Axial Ratio on Boresite | < 2 dB across the band |
| Axial Ratio at +/- 45° | < 5 dB across the band, (worst case figure) |
| Weight | 28g with flange |
| Construction | Aluminium / Plated Brass |
| Power Handling |
nom. 5W, c.w. |
| Dimensions
|
20 mm Diameter x 44.5 mm Length (Excluding Flange)
|
| Connector Type
|
K |
| Mounting |
Customer Specified. |
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