STMicroelectronics reveals single-chip antenna-matching ICs for easier, faster design with Bluetooth® LE SoCs and STM32 wireless microcontrollers - ST News
Self-contained Bluetooth Low Energy 5.1 Antenna Board for Direction Finding and Indoor Positioning
2.4GHz Flexible WiFi/BLE Antenna (U.FL) | The Pi Hut
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TZT Mini Antenna BLE Bluetooth Stereo Audio Dual Two Channel High Low Level Board Module per Arduino per IOS Automatic Sleep - AliExpress