In this letter, we present a concentric annular-ring microstrip antenna that covers the bands of Galileo (E5a, E5b, E1, E2, L1), GPS (L1, L2, L5), and GLONASS (L1, L3). This microstrip antenna is fed ...

Having the right shoes is essential for support and stability when experiencing knee or back pain. Here are our top recommendations for walking and running shoes.