Kinghelm RF SAW Filter KH-SAWF235A: Delivering Clean and Reliable Signal Paths for High-Speed Wireless Connectivity

Surface Acoustic Wave (SAW) filters play a crucial role in today’s wireless communication systems, offering excellent frequency selectivity, compact size, and stable electrical performance. As mobile networks, IoT devices, and RF front-end modules continue to evolve toward higher data rates and lower power consumption, the demand for compact, low-loss, and highly reliable RF filtering components is rising. Kinghelm’s KH-SAWF235A is a high-performance SAW filter specifically designed for TDSCDMA and TD-LTE Band 40 systems. Operating at a center frequency of 2.35GHz with a 100MHz bandwidth, it provides a clean and stable RF signal channel suitable for modern high-speed wireless communication.

Kinghelm KH-SAWF235A Product Image

One of the most important advantages of the Kinghelm KH-SAWF235A is its low insertion loss, with a typical value of only 2.2dB. In RF signal chains, excessive insertion loss directly affects the receiver sensitivity, limits the communication range, and can degrade both throughput and overall signal quality. With optimized SAW resonator design and precise frequency control, the KH-SAWF235A effectively suppresses unwanted out-of-band noise and adjacent-channel interference while maintaining very low signal attenuation. This allows mobile terminals and wireless IoT devices to maintain high-quality connections even in dense and complex electromagnetic environments.

Engineered with a standard 50-ohm impedance, the KH-SAWF235A ensures excellent compatibility with RF power amplifiers, LNAs, RF switches, and transceiver ICs widely used in the industry. Designers can integrate this filter into their RF modules without requiring complex matching networks or additional tuning, making system development more efficient and shortening the time-to-market. With its ultra-compact SMD-5P package measuring only 1.1 × 0.9mm, the component is ideal for space-constrained designs such as smartphones, wearable devices, compact IoT nodes, portable hotspots, and automotive wireless terminals.

For TD-LTE Band 40 applications (2300–2400MHz), the KH-SAWF235A offers a well-optimized filtering response across the entire 100MHz operating band. Band 40 is widely used for mobile broadband services and supports high-capacity, high-throughput data transmission. The wide passband of the KH-SAWF235A ensures stable uplink and downlink performance, enabling smooth video streaming, high-speed downloads, low-latency communication, and reliable multi-user data services. In TDSCDMA systems, the stable passband characteristics also help reduce timeslot interference and improve the overall transmission efficiency and quality.

To meet diverse application environments, the KH-SAWF235A supports an operating temperature range from −30°C to +85°C, ensuring stable performance under both indoor and outdoor conditions. Whether used in consumer electronics or in outdoor micro-base stations and wireless gateways, the device maintains consistent electrical characteristics. Additionally, the product is fully RoHS-compliant, reflecting Kinghelm’s commitment to environmentally friendly materials and sustainable manufacturing practices.

As a trusted brand in the RF components field, Kinghelm has accumulated extensive expertise in the design, manufacturing, and reliability control of SAW devices. Each KH-SAWF235A unit undergoes strict electrical testing, frequency precision verification, and environmental stress screening to ensure long-term stability and reliability. Its robust performance makes it suitable for a wide range of wireless applications, including smartphones, RF front-end modules, IoT communication devices, industrial wireless controllers, small cell base stations, and high-speed data transmission terminals.

Kinghelm KH-SAWF235A Specification

In summary, the Kinghelm KH-SAWF235A SAW filter stands out with its 2.35GHz center frequency, 100MHz passband, low insertion loss, 50-ohm impedance compatibility, and compact SMD package. Designed to deliver clean and stable RF signal pathways, it supports the continuously growing demand for faster, more reliable wireless communication. As devices become more compact and networks rely more heavily on high-efficiency RF front-end components, the KH-SAWF235A provides engineers with a dependable filtering solution while highlighting Kinghelm’s technical expertise and commitment to quality in the RF industry.

About Kinghelm

Shenzhen Kinghelm Electronics Co., Ltd.（www.kinghelm.net）has technical backbones from Tsinghua University and UESTC, and has introduced overseas returnee professionals. Kinghelm is able to develop highly reliable and high-performance antenna and connector products.KH series products of "Kinghelm" brand include Beidou/GPS antennas, RF adapter connectors, plug connector, electrical data connectors, terminals, and customized vehicle harnesses, industrial / medical connectors, and special antenna connectors."Kinghelm connects world", Kinghelm has grown with the development of China's Beidou industry. Starting from supplying Beidou/GPS dual mode antennas, IPEX terminals, and RF adapter cables for automotive manufacturers, Kinghelm has continuously developed products. Currently, it has a series of WiFi, Bluetooth, NB-loT, LoRa, Zigbee, UWB, and GSM antennas, RFID tags, RF adapter cables, standard microwave antennas, vehicle grade SMA, SMB, FAKRA holders, coaxial cables, and can customize non-standard antenna connectors based on customer drawings or samples.