Qualcomm is acquiring Arduino but allowing it to operate independently. The new Qualcomm-powered UNO Q is available for $44. Qualcomm is a huge player in the SBC space, dwarfing Raspberry Pi.
Abstract: This paper presents a new approach for designing of a controllable phase shifter based on integrated substrate waveguide (SIW) technology and PIN diodes for 5G millimeter wave wireless ...
Using high school trigonometry combined with knowledge of four-quadrant multipliers to form a frequency quadrupler.
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