2 GHz to 4 GHz Cavity Backed Spiral Antenna OBS-2040
$1235
The OBS-2040 is a compact, cavity-backed spiral antenna designed for high-performance transmission and reception across the 2.0 GHz to 4.0 GHz frequency range. With moderate gain and VSWR, this circularly polarized antenna provides an excellent impedance match and radiation pattern.
Key features of this antenna include the ability to receive both linearly and circularly polarized signals, with linear gain approximately 3 dB lower than circular gain. Its low-profile design, planar aperture, no phase center offset, flexibility for carrying, and lightweight and symmetrical radiation beam width ensure consistent performance across the entire frequency band. The antenna’s outermost dimensions are a diameter of 68mm and a height of 50mm.
With all the above benefits, it is ideal for a variety of demanding applications. Firstly, this antenna is particularly effective in medium-range communication, including WiFi, some satellite communications, and cellular networks. It provides a balance between range and data rate. In surveillance and radar systems, this antenna supports ground-based and airborne radar for medium-range detection, making it a key component in air traffic control and weather monitoring applications where moderate resolution and long-range coverage are needed. In addition, the antenna is also employed in electronic warfare (EW), particularly for signal interception and jamming. Its broad coverage makes it versatile for medium-range communication and radar systems used in general-purpose EW tasks. Lastly, it is used in broadcasting and satellite TV, especially for reliable, long-distance signal transmission. It is often utilized in satellite TV services and military communication systems, ensuring dependable and secure connections across large distances.
- Description
- Additional information
Description
SPEC
Cavity Backed Spiral Antenna
2GHz to 4GHz
OBS2040
The OBS2040 is a compact, moderate gain, moderate VSWR, circularly-polarized cavity-backed spiral antenna designed to transmit and receive in the frequency band of 2.0 GHz to 4.0 GHz. The antenna exhibits an excellent impedance match and radiation pattern.
It is capable of receiving both linearly polarized signals and circularly polarized signals. The linear gain (dBil) is about 3 dB lower than the circular gain (dBic).
The antenna has advantages such as a low profile, planar aperture, no phase center offset, near-constant beam width across the frequency band, symmetrical radiation beam width, extreme flexibility for carrying, and lightweight.
These advantages make the antenna a very good candidate for electronic warfare, direction finding, telemetry, and surveillance systems, as well as flush-mounted airborne applications. The antenna can also be used as a broadband feed for reflector antennas.
The antenna’s outer dimensions are a diameter of 68mm and a height of 50mm.
Applications
- Satellite communications
- Personal mobile communications
- Electronic warfare, direction finding, telemetry, and surveillance systems
- Embedded airborne applications
Features
- Very convenient to carry
- Wide frequency band
- Lightweight
- Small volume
- Easy to package
- Main lobe width
- Circular polarization, wide beam width
Cavity Backed Spiral Antenna Specifications | |
Part No. | OBS2040 |
Frequency | 2GHz – 4GHz |
Nominal Gain | -3 dB Typ ~ 1 dB Typ |
VSWR | Maximum 2.5:1, Typical 2.0:1 |
Pattern | Directional Beam |
3 dB Beam Width | 65° Minimum, Typical |
10 dB Beam Width | 120° Typical |
Input Impedance | 50 Ohms Nominal |
Input Connector | SMA Female |
Outline
Plot
Additional information
Min. Frequency (GHz) | 2 |
---|---|
Max. Frequency (GHz) | 4 |
Gain (dBi) | -3 Typ~1 Typ16° |
VSWR | 2.5:1 |
Impedance (Ω) | 50 |
Connection Type | SMA-Female |
Polarization | LHCP/RHCP |