As UAV communications, private LTE networks, and L-band broadband systems continue to evolve, itu 1.4 Pita frekuensi GHz (1428–1468 MHz) has become increasingly important for reliable wireless links.

Systems operating in this band often adopt TDD (Dupleks Divisi Waktu) dan Modulasi OFDM, both of which impose strict requirements on RF front-end performance—especially power amplifiers.

Dalam artikel ini, we introduce a high-performance 2T2R Bi-Directional Power Amplifier (BDA) designed specifically for these demanding applications.

Here is a client inquiry

I am looking for a Bi-Directional Power Amplifier (BDA) compatible with a 1.4 GHz broadband system that utilizes OFDM modulation and TDD (Dupleks Divisi Waktu). Untuk memastikan kinerja optimal, could you please specify the P1dB and Linear Output Power at 1.4 GHz, the RX/TX switching speed in microseconds, and the Noise Figure (tidak) of the RX path? Selain itu, I would like to know the typical current consumption at maximum output, the required supply voltage, and whether the thermal design is suitable for passive cooling on a mobile UAV platform. My device is 1428-1468 mhz range. My device has two antenna out 10watts. How to use an on/off switch? Only connect ext. PA connection right Do you have a 2T2R device amplifier.

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1. Ikhtisar Produk

Ini 1.4 GHz Bi-Directional Amplifier (BDA) is engineered for high-linearity, dual-channel wireless systems.

Fitur Utama:

• Rentang frekuensi: 1428–1468 MHz
• Arsitektur: 2T2R (2 Mengirimkan / 2 Menerima)
• Daya Keluaran: 10W per saluran
• Mode Dupleks: TDD
• Dukungan Modulasi: OFDM
• Aplikasi: UAV, broadband wireless, sistem komunikasi taktis

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2. Why This Amplifier Matters

High Linearity for OFDM Signals

OFDM signals have a high peak-to-average ratio (PAPR), requiring amplifiers to operate in a highly linear region.

• P1dB: ≥ 40 dBm
• Linear Output Power (OFDM): 34–37 dBm
• Ensures low EVM and minimal signal distortion

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Fast TDD Switching Performance

TDD systems require rapid switching between transmit and receive modes.

• RX/TX Switching Time: ≤ 5 µs
• Enables precise timing alignment and reduces packet loss

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Low Noise RX Path

Receiver sensitivity is critical in long-range communication.

• kebisingan Gambar (tidak): ≤ 2.5 dB
• Maintains high signal integrity in weak signal conditions

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Konsumsi Daya yang Efisien

Optimized for mobile and airborne platforms:

• pasokan Tegangan: 12V / 24V / 28V
• Konsumsi saat ini: ~2–4A @ 28V (max output)
• High efficiency reduces thermal stress

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Thermal Design for UAV Applications

• Dirancang untuk passive cooling with heatsink
• Cocok untuk airflow-assisted environments (UAV flight)
• Kompak dan ringan

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3. Integrasi & Penggunaan

RF Connections

• 2 × TX outputs
• 2 × RX inputs
• 50Ω Impedansi

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External PA Control

• mendukung TX Enable (PA_EN) control pin
• Allows fast switching and power management

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Power ON/OFF Options

1. DC Power Switch (Simple Method)
2. GPIO Enable Control (Direkomendasikan)

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4. Aplikasi khas

• Tautan data UAV
• L-band broadband systems
• Emergency communication networks
• Tactical radio systems
• Video transmission platforms

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Full Datasheet

1. spesifikasi umum

Parameter	Spesifikasi
Rentang frekuensi	1428 - 1468 MHz
Arsitektur	2T2R
Mode Dupleks	TDD
Modulasi	OFDM Compatible
Daya Keluaran	10W per saluran

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2. Pemancar (TX) spesifikasi

Parameter	Minimal	Khas	Max	Satuan
Output P1dB	40	41	42	dBm
Linear Output Power (OFDM)	34	35	37	dBm
Mendapatkan	30	32	35	dB
Input Return Loss	–	10	–	dB
Output Return Loss	–	10	–	dB

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3. Penerima (RX) spesifikasi

Parameter	Minimal	Khas	Max	Satuan
Mendapatkan	10	15	20	dB
kebisingan Gambar (tidak)	–	2.2	2.8	dB
Input Return Loss	–	10	–	dB

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4. TDD Switching Performance

Parameter	Spesifikasi
TX to RX Switching Time	≤ 5 µs
RX to TX Switching Time	≤ 5 µs

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5. Spesifikasi listrik

Parameter	Spesifikasi
pasokan Tegangan	12V / 24V / 28V
Konsumsi saat ini	2–4A @ 28V
Konsumsi daya	~50–100W

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6. Mekanis & Panas

Parameter	Spesifikasi
Metode pendinginan	Pasif (Heatsink)
توص推荐环境	Airflow-assisted (penggunaan UAV)
pemasangan	Aluminum chassis

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7. Antarmuka Kontrol

Parameter	Spesifikasi
PA Enable	TTL / GPIO
TDD Control	External control signal
Konektor RF	SMA / Kebiasaan

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8. Lingkungan

Parameter	Spesifikasi
Suhu Operasional	-20° C hingga +60 ° C.
Suhu penyimpanan	-40°C hingga +85 °C