Comme communications par drone, réseaux LTE privés, et les systèmes à large bande en bande L continuent d'évoluer, le 1.4 GHz frequency band (1428–1468 MHz) has become increasingly important for reliable wireless links.

Systems operating in this band often adopt TDD (Time Division Duplexing) et Modulation OFDM, both of which impose strict requirements on RF front-end performance—especially power amplifiers.

Dans cet article, 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 (Time Division Duplexing). Pour garantir des performances optimales, 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 (NF) of the RX path? En plus, 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. Présentation du produit

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

Key Features:

• Gamme de fréquences: 1428–1468 MHz
• Architecture: 2T2R (2 Transmettre / 2 Recevoir)
• Puissance de sortie: 10W per channel
• Duplex Mode: TDD
• Modulation Support: OFDM
• Application: drone, broadband wireless, systèmes de communication tactiques

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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.

• Chiffre de bruit (NF): ≤ 2.5 dB
• Maintains high signal integrity in weak signal conditions

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Efficient Power Consumption

Optimized for mobile and airborne platforms:

• Tension d'alimentation: 12V / 24V / 28V
• Consommation actuelle: ~2–4A @ 28V (max output)
• High efficiency reduces thermal stress

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Thermal Design for UAV Applications

• Conçu pour passive cooling with heatsink
• Convient pour airflow-assisted environments (UAV flight)
• Compact and lightweight

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3. Intégration & Usage

RF Connections

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

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External PA Control

• Prise en charge 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 (Recommandé)

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4. Applications typiques

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

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Full Datasheet

1. General Specifications

Paramètre	spécification
Gamme de fréquences	1428 – 1468 MHz
Architecture	2T2R
Duplex Mode	TDD
Modulation	OFDM Compatible
Puissance de sortie	10W per channel

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2. Émetteur (Émission) Specifications

Paramètre	Min	Typique	Max.	Unité
Output P1dB	40	41	42	dBm
Linear Output Power (OFDM)	34	35	37	dBm
Gagner	30	32	35	dB
Input Return Loss	–	10	–	dB
Output Return Loss	–	10	–	dB

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3. Récepteur (RX) Specifications

Paramètre	Min	Typique	Max.	Unité
Gagner	10	15	20	dB
Chiffre de bruit (NF)	–	2.2	2.8	dB
Input Return Loss	–	10	–	dB

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4. TDD Switching Performance

Paramètre	spécification
TX to RX Switching Time	≤ 5 µs
RX to TX Switching Time	≤ 5 µs

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5. Spécifications électriques

Paramètre	spécification
Tension d'alimentation	12V / 24V / 28V
Consommation actuelle	2–4A @ 28V
Consommation d'énergie	~50–100W

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6. Mécanique & Thermique

Paramètre	spécification
Cooling Method	Passive (Heatsink)
توص推荐环境	Airflow-assisted (Utilisation de drones)
Mounting	Aluminum chassis

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7. Interface de contrôle

Paramètre	spécification
PA Enable	Durée de vie / GPIO
TDD Control	External control signal
Connecteur RF	SMA / Coutume

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8. Environnemental

Paramètre	spécification
Operating Temperature	-20°C à +60°C
Température de stockage	-40°C à +85°C