

The main picture is illustrative, generated to show how the antenna looks once installed. Alongside it is the manufacturer's own photograph.
TQJ-3800-4000-9
n77 9 dBi omni antenna, 3.8–4.0 GHz
Fibreglass omnidirectional antenna for the lower half of the 3.8–4.2 GHz shared access band, N-female, 645 mm.
About this antenna
A slim fibreglass collinear for the lower half of the UK shared access band. It radiates evenly in every direction, which makes it the natural choice when a radio sits in the middle of the area it has to cover: a farmyard, a holiday park, a boatyard, the centre of a campus.
The trade-off is gain. At 9 dBi it reaches less far in any one direction than a sector, and it hears interference from every direction too. Where the coverage area sits to one side of the mounting point, a sector is usually the better buy.
Where it fits
- The top of a short pole on a gable end, a barn roof or a clubhouse, clear of the roofline.
- Sites where the radio sits in the middle of the coverage area.
- Shared access licences in 3.8–4.0 GHz. For 4.0–4.2 GHz choose the TQJ-4000-4200-9.
Specification
Electrical
| Frequency range | 3800–4000 MHz |
|---|---|
| Gain | 9 dBi |
| VSWR | ≤ 1.8 |
| Polarisation | Vertical |
| Horizontal beamwidth | 360° |
| Vertical beamwidth | 8° ± 1° |
| Impedance | 50 Ω |
| Maximum input power | 100 W |
| Lightning protection | DC ground |
Mechanical
| Connector | N-female |
|---|---|
| Dimensions | Ø20 × 645 mm |
| Weight | 0.6 kg |
| Colour | Grey |
| Radome | Fibreglass |
| Operating temperature | −40 °C to +65 °C |
| Mounting pole | Ø38 to Ø52 mm |
Radiation pattern
The manufacturer has not supplied a measured pattern for this model. As a vertical collinear it is omnidirectional in the horizontal plane (360°), with a narrow 8° ± 1° vertical beam, so most of the energy goes out towards the horizon rather than down at the ground close to the pole. If you need a pattern file for planning, ask us and we will request one.
Other antennas
TQJ-4000-4200-9
n77 9 dBi omni antenna, 4.0–4.2 GHz
£115.50 ex VAT
TDB-4000-4200-16-120
n77 15 dBi 120° sector antenna, single port
£471.06 ex VAT
TDB-3800-4200X-16-120
n77 90° dual-polarised sector antenna, 2-port
£556.36 ex VAT
TDB-3800-4200XX-12-65
n77 12 dBi 65° sector antenna, 4-port
£175.20 ex VAT
D-3342X2-12-4310F
Lamp-post wraparound sector antenna, 3.3–4.2 GHz
Price on application
