The industry standard for cash back used to be 1%. As its name implies, the Citi Double Cash® Card essentially doubles that rate, paying 1% back on purchases and 1% after paying the bill. The ...

In this letter, a full-band balanced frequency doubler covering 140–220 GHz range is reported. To feed the Schottky barrier diodes (SBDs) with a reverse phase, a novel inline waveguide-to-microstrip ...