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机译:A formula formulatype="inline" img src="/images/tex/550.gif" alt="G" /formula-Band Four-Element Butler Matrix in 0.13 μm SiGe BiCMOS Technology
IHP, Frankfurt (Oder), Germany;
Arrays; Butler matrices; Couplers; Gain; Noise measurement; Receivers; Switches; BiCMOS; Butler matrix; SiGe; millimeter-wave; phased array;