As a core bidirectional transceiving device in RF communication systems, the RF duplexer undertakes important functions such as transceiving signal isolation, frequency band screening, and stable transmission of bidirectional links. It is widely applied in full-scenario equipment such as 5G communication base stations, microwave transmission equipment, satellite communication, industrial wireless private networks, and intelligent IoT RF systems. With the rapid iteration of modern RF transmission technology, communication equipment has gradually developed towards high frequency, multi-band coexistence and uninterrupted high-throughput transmission, resulting in emerging various transmission pain points that continuously plague the stable operation of RF systems. Common problems including signal crosstalk, power loss, parameter drift, link imbalance, clutter interference and abnormal transmission delay not only reduce the quality of communication transmission, but also increase equipment operation and maintenance costs. Optimized specifically for various transmission pain points, the high-performance RF duplexer solves transmission problems in an all-round manner from multiple dimensions including structure, technology, materials and circuit design, fully repairs defects of RF links, and serves as a core device ensuring the efficient, stable and long-term operation of RF systems.

　　In the process of traditional RF networking and bidirectional transmission, various frequent transmission pain points seriously restrict the performance of equipment. The most prominent problem is transceiving signal crosstalk. Traditional ordinary duplexers have crude isolation design and insufficient accuracy in distinguishing transceiving channels. Signal mutual interference and reverse flow interference are prone to occur during the synchronous transmission of bidirectional signals. High-power signals from the transmitting end penetrate the receiving link, directly suppressing weak receiving signals, causing signal distortion, sharp drop of signal-to-noise ratio, data packet loss, transmission stuttering and invalid command response. In precision RF testing and low-delay communication scenarios, such defects will directly lead to system operation failures. Meanwhile, most old devices have insufficient impedance matching accuracy and weak full-band adaptation capability, resulting in severe impedance imbalance under multi-frequency transmission conditions, obvious insertion loss and power attenuation, asymmetric uplink and downlink rates, limited transmission bandwidth and uneven signal coverage, which greatly reduce the overall communication efficiency.

　　In addition, parameter drift and poor working condition stability are high-frequency transmission pain points in the industry. Adopting ordinary materials and simple circuit layout, conventional RF duplexers are prone to internal circuit heat accumulation and electromagnetic erosion after long-term operation under high-frequency and continuous high-throughput transmission conditions, triggering parameter deviation, increased loss and attenuated filtering performance. With the extension of equipment operation time, the comprehensive performance of ordinary devices continues to decline, and the original standard transmission parameters gradually deviate from the calibrated values, resulting in disordered link transmission states and frequent faults such as communication fluctuation, signal breakpoint and frequency band offset. Furthermore, the pain point of clutter interference in complex electromagnetic environments is particularly prominent. In scenarios such as urban dense base stations, industrial plants and centralized computer room networking, intensive superimposed electromagnetic clutter cannot be filtered effectively by ordinary devices lacking high-efficiency shielding structures. Mixed clutter will seriously damage signal purity, cause deviation of transmission data and affect the precise operation of equipment.

　　At the same time, traditional duplex devices have latent transmission pain points such as severe temperature drift, poor adaptability and insufficient durability. Outdoor working conditions with alternating high and low temperatures and heat accumulation from long-term equipment operation will cause material deformation and fluctuation of electrical performance of ordinary devices, further aggravating the instability of transmission parameters and failing to realize all-weather stable transmission. Some devices have narrow frequency band coverage and cannot adapt to the demand of multi-frequency integrated transmission, resulting in frequency band conflicts and transmission blockage during the concurrent transmission of multi-band signals, which makes it difficult to adapt to new scenarios such as 5G multi-frequency networking and industrial high-frequency transmission. These overlapping transmission pain points not only reduce the transmission accuracy and operational efficiency of RF systems, but also increase the frequency of equipment debugging and calibration, raise equipment failure rate and operation and maintenance costs, shorten the service life of the entire RF equipment, and become a major obstacle to the large-scale and high-precision development of the RF industry.

　　Fully optimized for the above full-category transmission pain points, the RF duplexer achieves all-round performance upgrades and solves various transmission drawbacks from the source. Adopting a high-precision dual-channel physical isolation architecture, it completely separates transceiving transmission links, greatly improves channel isolation, thoroughly eliminates bidirectional signal crosstalk and signal reverse flow, and ensures independent and pure transmission of transceiving signals. Through the full-range accurate impedance matching and calibration technology, it adapts to full-band transmission requirements, effectively reduces insertion loss and power attenuation, balances uplink and downlink transmission rates, widens transmission bandwidth, and solves problems such as rate imbalance and uneven signal coverage. Equipped with a high-strength electromagnetic shielding and built-in filtering structure, it can efficiently filter external electromagnetic clutter and harmonic interference, purify the transmission link environment, and continuously ensure high-purity signal transmission.

　　In terms of working condition stability optimization, the newly upgraded RF duplexer adopts low-loss and temperature-resistant special materials and precision integrated molding technology, with greatly improved temperature drift resistance and electromagnetic erosion resistance. It can maintain constant parameters in a wide temperature range and complex electromagnetic environments, eliminating performance drift and increased loss caused by long-term operation. Featuring ultra-wide frequency band adaptation capability, it is compatible with mainstream multi-frequency transmission scenarios, perfectly adapts to the concurrent transmission of multi-signals and high-frequency continuous transmission working conditions, and thoroughly solves the problems of frequency band conflict and transmission blockage. Whether in commercial communication networking, industrial wireless transmission, precision microwave testing, or complex scenarios such as satellite communication and outdoor base stations, this RF duplexer can comprehensively solve various transmission pain points, stabilize link transmission status, improve the transmission efficiency and accuracy of RF systems, reduce equipment failure probability and operation and maintenance costs, and provide long-term, stable and high-quality transmission guarantee for various RF transmission systems.