TDD Power Amplifier Chip BDA Bi-Directional Amplifier system Circuit PCBA for CX660X video data transceiver

TDD Power Amplifier Introduction

1. The MorningCore CX660x video transmission transceiver module has a small transmit power and a short transmission distance. Consider increasing the transmit power of the device and using it with a 2-watt/5-Watt/10-watt power amplifier to increase the transmit power and increase the distance.
2. The 2W design adopts TDD mode. The transceiver and receiver are integrated on the same circuit board. The internal RF transceiver signals are separated through the analog switch chip. The external RF interface has only one SMA interface.
3. The 2W RF module link design uses a transmit gain of 15dB, the output power is 33 dBm, and a receive gain of 13 dB.
4. The structural design of the 2-watt power amplifier module requires a separate power amplifier box. The complete product also requires the external design of the complete machine casing, power supply, control signal input, RF connection, antenna interface, power amplifier heat dissipation, etc.
5. The design of the 2-watt power amplifier module only considers function implementation. Functions such as power amplifier working status, performance indicators, alarm information, temperature characteristic compensation, etc. are not implemented, which is not conducive to the indicators and quality control of power amplifier module production and testing, and is not conducive to abnormal problems during on-site application: response and processing.

Specification

Parameters	Product Requirements
Operating frequency range	1427MHz～1447MHz (800Mhz and 2.4G are optional) 1420Mhz~1530Mhz optional
Send Maximum Gain	15dB±1dB
Maximum Output Power	33dBm±2dB (full temperature range)
Adjacent Channel Leakage Suppression ratio ACPR	Offset 20M ≤-30dBc Offset 20M ≤-45dBc (taking WCDMA source and template as an example)
Intermodulation Attenuation (IMD3)	≤-30dBc @2 tone 1MHz interval maximum output power
Receive gain	13dB±1dB
Receive Noise Figure	≤3dB
Input and output voltage standing wave ratio VSWR	≤1.5
Ripple in Band	≤1.5dB (peak-peak)
Working Temperature	-40℃-+85℃
Relative Humidity	95％（40℃）
Module size
Module Weight
Module Main Power Supply	DC12V
Module Auxiliary Power Supply	DC5V
Module power consumption	≤10W @ Pout 33dBm full send
Signal Control	T/R enable (transmit high active)

TDD Power Amplifier Module Interface Definition

No.	Definition and silk screen logo	quantity	Interface standards	Function description
1	J2	1	SMA	Antenna transceiver
2	J1	1	SMA	RF signal connection CX660X main terminal
3	J4	1	PH2.0_4p	Power and control signals

PH2.0_4p definition

No.	PIN Foot	Function description
1	1	T/R transceiver enables signal
2	2	GND
3	3	Power supply DC5V input
4	4	Power supply DC12V input

Notes on using PA

This BDA bare board amplifier can be used with the Morningstar module. Special attention to users:
1. A separate cavity needs to be designed to place the amplifier board, using a shell or adding a cooling fan.
2. The separate cavity can be separated from the Morningstar transceiver board to avoid interference. And it can be locked with screws.

Weight

FAQ

Q1: Does your TDD bidirectional module support the 1420-1530Mhz frequency range of MorningCore Mlink2?

A1: Yes, supported if you tell us.

TDD (Time Division Duplex) power amplifiers are essential components in modern wireless communication systems, particularly in applications that require efficient transmission and reception of signals. Here’s an overview of their advantages and applications.

Advantages of TDD Power Amplifiers

• Efficiency: TDD power amplifiers operate in a mode where the amplifier is only active during the transmission phase, which allows for significant power savings. This on-off operation reduces heat generation and extends the lifespan of the amplifier components, making them more efficient compared to continuous operation amplifiers.
• High Gain and Linearity: These amplifiers often utilize advanced technologies like GaN (Gallium Nitride) and LDMOS (Lateral Diffused Metal Oxide Semiconductor), which provide high gain and excellent linearity. This ensures that the transmitted signals maintain their integrity over long distances, minimizing distortion.
• Compact Design: TDD power amplifiers are typically designed to be compact and lightweight, making them suitable for deployment in space-constrained environments such as mobile base stations and portable communication devices. This compactness also facilitates easier integration into existing systems.
• Flexibility in Frequency Range: They can operate over a wide frequency range (e.g., 20 MHz to 6 GHz), making them versatile for various applications across different communication standards.
• Cost-Effectiveness: By reducing the number of required components through integrated designs, TDD amplifiers can lower overall system costs. Their efficient power management also contributes to reduced operational costs.

Applications of TDD Power Amplifiers

• Mobile Communications: TDD power amplifiers are widely used in mobile base stations for technologies like LTE and 5G. They enable efficient uplink and downlink communication by alternating between transmission and reception phases, optimizing bandwidth usage.
• Wireless Networks: In Wi-Fi systems and other wireless networks, TDD amplifiers help manage the traffic between devices effectively, ensuring reliable connectivity even in high-demand scenarios.
• Satellite Communications: These amplifiers are crucial in satellite communication systems where they enhance signal strength for both uplink (sending signals to satellites) and downlink (receiving signals from satellites) operations.
• Radar Systems: In radar applications, TDD power amplifiers improve the performance of detection systems by providing strong signal amplification while managing power consumption effectively.
• Electronic Warfare: TDD technology is employed in electronic warfare systems where rapid switching between transmitting and receiving modes is necessary for effective operation and signal intelligence gathering.

In summary, TDD power amplifiers offer significant advantages in terms of efficiency, gain, compactness, and cost-effectiveness. Their versatility makes them suitable for a wide range of applications in modern wireless communication systems, enhancing performance while optimizing resource usage.

Chinese version for 2W TDD PA examination