Low-noise Optical Terminal & LNB
Integrated LNA + Optical Transmission · L / S / C / X / Ku Bands · Ultra‑Low Noise
The low-noise optical terminal integrates a low-noise amplifier (LNA) with a microwave optical transmitter, enabling long‑distance fiber‑optic transmission of RF signals with minimal signal degradation. Ideal for antenna remoting and sensitive receiver front‑ends.
Functional Requirements (All OTA Models)
- Built‑in 60dB low‑noise amplification
- Fiber‑optic transmission of RF signals (L/S/C/X/Ku bands)
- Adaptive transmission distance adjustment
- Power loss preservation & power‑on recovery
- Optical signal alarm / normal indicator
- Input power detection & saturation alarm
- Remote gain control (0‑10dB, 1dB step at receiver)
- Hot‑swappable module support (optional chassis)
| Model | Frequency (LNA) | Noise Figure (LNA) | Gain (LNA) | Output P1dB (LNA) | Optical Tx Freq | Optical Wavelength | Range (km) |
|---|---|---|---|---|---|---|---|
| GJT-OTA-L | 1.5 – 1.7 GHz | ≤50K (25°C) | ≥60 dB | ≥+10 dBm | 30 MHz – 2.7 GHz | 1310/1550 nm | 0–20 |
| GJT-OTA-S | 2.2 – 2.7 GHz | ≤60K (25°C) | ≥60 dB | ≥+10 dBm | 30 MHz – 2.7 GHz | 1310/1550 nm | 0–20 |
| GJT-OTA-C | 3.4 – 4.2 GHz | ≤40K (25°C) | ≥60 dB | ≥+10 dBm | 3.4 – 4.2 GHz | 1310/1550 nm | 0–20 |
| GJT-OTA-X | 7.25 – 7.75 GHz | ≤65K (25°C) | ≥60 dB | ≥+10 dBm | 7.25 – 7.75 GHz | 1310/1550 nm | 0–20 |
| GJT-OTA-Ku | 10.7 – 12.75 GHz | ≤80K (25°C) | ≥60 dB | ≥+10 dBm | 10.7 – 12.75 GHz | 1310/1550 nm | 0–20 |
▸ In‑band flatness (LNA): ≤1.0 dBp-p (L), ≤1.5 dBp-p (S/C/X), ≤2.0 dBp-p (Ku) | VSWR ≤1.35:1 (L/Ku), ≤1.5:1 (S), ≤1.3:1 (C/X)
▸ Optical receiver gain adjustment: 0–10 dB, 1dB step | Noise figure (optical link): ≤15dB (L/S), ≤20dB (C), ≤23dB (X), ≤25dB (Ku)
▸ Interfaces: RF input (N-50K or FDM/FBM sealed), RF output (SMA-50K), optical (FC/APC), communication (DB9 / RJ45), power (DC +15V / AC 220V)
Product Overview
The low‑noise downconverter processes signals from the feed source through low‑noise amplification and down‑conversion to intermediate frequency. Widely used in satellite ground stations, mobile communication systems, and similar applications.
Key Features
Wide bandwidth, low noise figure, low phase noise, compact size, high stability (microassembly technology). Customizable frequency bands (C, X, Ku, etc.) and gain options available.
Typical Specifications (example): Noise Figure ≤0.8 dB, Gain ≥55 dB, Output P1dB ≥+10 dBm, LO phase noise ≤ -85 dBc/Hz @1kHz. Please contact us for detailed datasheet.
All OTA models share the functional requirements listed above. Customization (frequency band, gain, connectors) available upon request.