GPS Helix Antenna Tuning Kit. The tuning kit is an inexpensive, quick and effective way to determine the correct GPS antenna to use inside a device. The tuning kit contains five standard Helicore® samples optimized for a range of different loading conditions commonly encountered in devices requiring an embedded antenna configuration. The tuning kit was designed to empower engineers responsible for devices requiring an embedded antenna configuration. The tuning kit allows for both quick and easy antenna selection and removes the need for a lengthy and costly custom antenna integration process.