20W PA Power Amplifier For COFDM Wireless Video Transmitter DVB-T2 signal sender specification
| Test items | Indicator requirements |
| فرکانس کاری (مگاهرتز) | 510±15 |
| توان خروجی(W) | 20 |
| In-band group delay (ns) | ≤50 |
| به دست آوردن(دسی بل) | 58±1.0 |
| سطح ورودی (DBM به) | -15±1 |
| نوسان درون باند (دسی بل) | ≤1.0 (peak-to-peak value) |
| Gain change (-20～+70℃) (دسی بل) | ≤±1.0 |
| VSWR | ≤1.35 |
| Band shoulder ratio (dBc) | ≤-35 |
| power requirements | ≤＋28 Vdc 20W/3.0A |
| دمای کاری | -25+65 ℃ |
| رابط RF | SMA-50KFD |
| Module volume (میلی متر) | 178×91×20 |
نمای کلی
This 20W power amplifier module is designed for long-range COFDM/DVB-T2 wireless video transmission systems. It provides a stable, high-gain RF boost for airborne and ground transmitters, enabling reliable HD video uplinks over extended line-of-sight ranges. The unit is compact, ناهموار, and temperature-hardened for field deployment on UAVs, وسایل نقلیه, towers, and portable base stations.
ویژگی های کلیدی
• 20 W continuous RF output suitable for long-range uplink applications.
• Precise gain control: 58 ± 1.0 dB gain for predictable link budgets.
• Low in-band group delay (≤ 50 ns) for minimal video distortion and lip-sync issues.
• Tight in-band flatness (≤ 1.0 dB p-p) for consistent modulation fidelity across the band.
• Excellent VSWR (≤ 1.35) and band shoulder ratio (≤ −35 dBc) to protect the amplifier and minimize spurious emissions.
• Wide operating temperature: −25 °C to +65 °C for outdoor/vehicle use.
• Compact form factor: 178 × 91 × 20 mm — suitable for integration into small payload bays.
• SMA-50KFD RF interface for easy connection to standard coax/antenna systems.
• Low input level requirement: −15 ± 1 DBM به.
• Power: accepts up to +28 VDC; typical current for 20W output ~3.0 A.
Technical specifications (test items / indicator requirements)
• Operating frequency (مگاهرتز): 510 ± 15
• Output power (W): 20
• In-band group delay (ns): ≤ 50
• Gain (دسی بل): 58 ± 1.0
• Input level (DBM به): −15 ± 1
• In-band fluctuation (دسی بل): ≤ 1.0 (اوج به اوج)
• Gain change (−20 to +70 درجه سانتی گراد) (دسی بل): ≤ ±1.0
• VSWR: ≤ 1.35
• Band shoulder ratio (dBc): ≤ −35
• Power requirements: ≤ +28 VDC, 20W / 3.0 آ
• Working temperature: −25 to +65 درجه سانتی گراد
• RF interface: SMA-50KFD
• Module volume (میلی متر): 178 × 91 × 20
Recommended applications
• UAV/Drone HD video uplink for commercial and industrial inspection.
• Multi-node COFDM networks (airborne transmitters to ground receiver).
• Mobile command posts, temporary surveillance stations, and tactical deployments.
• Any DVB-T2 / COFDM based HD video transmission that requires a compact high-power RF stage.
Integration & installation notes
• Ensure adequate RF cabling and a properly matched antenna to maintain VSWR ≤ 1.35.
• Provide stable +28 VDC power with sufficient current headroom (recommend power supply rated ≥ 4 A to allow margin for turn-on/inrush).
• Mount on a thermally conductive surface or provide airflow; although temperature spec is wide, sustained high-power operation benefits from good thermal management.
• Use appropriate RF filtering and licensing/coordination in your region for 510 ± 15 عملکرد مگاهرتز.
• For multi-transmitter networks, coordinate frequency plans and time/multiplexing to avoid co-channel interference.
Ordering & گزینه ها
• Standard module as described.
• اختیاری: integrated RF connector variants, custom frequency ranges, or ruggedized enclosure.
• Factory test report and calibration available on request.
Contact us with your system diagram (آنتن, cable length, receiver sensitivity and encoder bitrate), and we will calculate link budgets and recommend an optimized configuration for single or multi-node deployments.
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