datasheet antenna microwave test substrate 전자회로 설계 op-amp smartphone 강의계획서 electromagnetics rf diode 증폭기 system impedance matching communication transistor dipole antenna transmission line power divider cell phone 미래설계 저주파 감쇄기 저항 상담 electromagnetic radiation iphone 4s array antenna high gain electronic circuit broadband antenna loop antenna 안테나 전파 wireless system reflectarray paper bluetooth dac regulator voltage regulator fet field effect transistor bipolar junction transistor bjt semiconductor electromagnetic wave power combiner hardware smith chart waveguide resonator filter specifications zigbee power amp 미래 스마트폰 트랜지스터 tr 필터 주파수 이득
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