YAESU FTM-300DR 50W Dual Band Transceiver Car Mobile Radio Bluetooth GPS 10Km | eBay
Figure 2 from A compact dual-band (L1/L2) GPS antenna design | Semantic Scholar
What is Multi-Band GPS & Multi-Frequency GPS? | Inertial Sense
Amazon.com: Taidacent Dual Frequency GPS Module 33db High Gain 5cm Line IPEX Terminal GPS+ Beidou Built in GPS Receiver with Active Ceramic Dual Band Pach Antenna BT-25B : Electronics
GPS Active Dual Band Antenna Operates From 1.22 GHz to 1.58 GHz With a Nominal 6 dBic Gain N Female Input Connector