TDD Power Amplifier Chip BDA Bi-Directional Amplifier system Circuit PCBA for CX660X video data transceiver
Table of Contents
TDD Power Amplifier Introduction
- 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.
- 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.
- 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.
- 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.
- 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.
Q: Why did my power amplifier arrive without the SF9700 filter?
A: The inclusion of the SF9700 filter depends on the specified operating frequency range of the power amplifier:
- For frequency ranges of 1427–1447 MHz:
The SF9700 filter is applicable and can be included, as it is designed to operate effectively within this narrower band. - For frequency ranges of 1420–1530 MHz:
This range exceeds the supported bandwidth of the SF9700 filter. Since the filter cannot properly cover the full frequency span, it must be omitted to ensure optimal amplifier performance.
Additional Note: Using a filter outside of its specified frequency range may degrade signal quality or overall system performance. Therefore, the filter is only included when it is fully compatible with the requested frequency band.
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.
Ali –
This groundbreaking new technology is poised to revolutionize the field of drone remote inspections, significantly altering how we perform these critical assessments and leading to more efficient and effective methods. In mountainous terrain, the implementation of this novel BDA(Bidirectional Amplifier) system resulted in a remarkable 40% increase in the operational range of our CX660X transceiver. Our UAV wireless video data link requires crystal-clear video feeds transmitted with zero latency for optimal performance and to ensure the integrity of the operation.