3G Wi-Fi6 built-in antenna solutions

　　For internal antenna solutions for 3G and Wi-Fi 6 (IEEE 802.11ax), designers need to consider the requirements of these two different communication standards at the same time. 3G generally refers to the third generation of mobile communication technology, which operates in multiple frequency bands (such as 850 MHz, 900 MHz, 1800 MHz, 1900 MHz, etc.), while Wi-Fi 6 mainly operates in 2.4 GHz and 5 GHz frequency bands. Therefore, the internal antenna solution integrating these two technologies needs to pay special attention to multi-band support, space constraints, and performance optimization. The following is the key information and technical features of the 3G Wi-Fi 6 internal antenna solution:

　　1. Multi-band support

　　3G frequency band: Ensure that the antenna can effectively cover the commonly used frequency bands of 3G, such as 850 MHz, 900 MHz, 1800 MHz, 1900 MHz, etc.

　　Wi-Fi 6 frequency band: supports 2.4 GHz and 5 GHz frequency bands, and has advanced features required by Wi-Fi 6, such as MIMO, OFDMA, MU-MIMO, etc.

　　2. Antenna type and design

　　2.1 Combination Antenna

　　Features: A single antenna unit can support multiple frequency bands at the same time, simplifying the design and reducing space occupation. Combination antennas can support 3G and Wi-Fi 6 frequency bands through appropriate tuning and matching networks.

　　Application: Suitable for devices with limited space but requiring multi-band support, such as smartphones, tablets, IoT devices, etc.

　　2.2 Separate Antennas

　　Features: Separate antenna units are designed for 3G and Wi-Fi 6 to ensure the best performance of each frequency band. This method can avoid mutual interference between different frequency bands and provide higher isolation.

　　Application: Suitable for devices with high performance requirements, such as fixed-installed wireless devices such as routers and access points.

　　3. Key technologies

　　Multiple-input, multiple-output (MIMO): Wi-Fi 6 supports up to 8x8 MIMO configurations, while 3G may also use MIMO technology (such as HSPA+). Internal antennas need to support these configurations to achieve better spatial multiplexing and higher throughput.

　　Orthogonal frequency division multiple access (OFDMA) and MU-MIMO: Improve network efficiency and reduce latency by assigning different frequency resource blocks to multiple clients at the same time. Antenna design should take this into account to optimize multi-user communication performance.

　　Low noise amplifier (LNA) and power amplifier (PA): To enhance receive sensitivity and transmit power, LNA can be integrated at the front end of the antenna and PA can be integrated at the transmit end, especially in 3G bands.

　　4. Design considerations

　　Antenna placement: It is important to choose the right location to ensure good signal coverage while avoiding interference with other internal components. Antennas are usually placed at the edge or corner of the device housing, away from large metal parts and other RF sources.

　　Isolation: For multi-antenna configurations, ensure that there is enough isolation between each antenna to reduce self-interference and improve overall performance. High isolation is particularly important when 3G and Wi-Fi 6 coexist.

　　Material selection: Use low-loss dielectric materials to make antennas and the structures around them to reduce signal attenuation and improve efficiency. For 3G bands, physical size issues caused by longer wavelengths may also need to be considered.

　　Aesthetic appearance: The built-in antenna should not destroy the overall design aesthetics of the product, so designers need to find a balance between function and aesthetics.

　　5. Selection Guide

　　Determine the needs

　　Target market and application scenarios: Clarify whether your product is for consumers or enterprise users, and in what environment it will be used.

　　Performance indicators: Evaluate key performance parameters such as gain, bandwidth, standing wave ratio (VSWR), isolation, etc. to ensure that specific technical requirements are met.

　　Technical requirements

　　Regulatory compliance: Confirm that the selected antenna meets relevant industry standards and regulatory requirements of the country or region, such as CE, FCC, etc.

　　Environmental adaptability: Ensure that the selected antenna can operate reliably in the expected working environment, including temperature changes, humidity and other external factors.

　　Cost-effectiveness

　　Budget considerations: Select the most cost-effective antenna product based on the project budget, while ensuring that the necessary performance or quality standards are not sacrificed.

　　Supplier support and services

　　Technical support: Choose suppliers with good reputation and technical support capabilities to ensure the reliability of after-sales service.

　　Customized services: Some suppliers may provide customized solutions to help customers develop the most suitable antenna system according to specific needs.