Martin Lewis reveals little-known Amazon trick for up to 70% off last-minute Christmas shopping

If you’re on the hunt for previous generation models from Apple, Samsung or Dell, this is the place to be looking. And while ...
IEEE

Low-Cost Empty Substrate Integrated Waveguide Slot Arrays for Millimeter-Wave Applications

Abstract: In this letter, two slot arrays with high radiation efficiency are proposed based on the empty substrate integrated waveguide (ESIW) technology. The arrays consist of four FR-4 substrate ...