A phase modulator idunhu umo chikamu chemutakuri wave chinodzorwa nemodulating chiratidzo. Kune marudzi maviri e sine wave phase modulation: yakananga chikamu modulation uye isina kunanga chikamu modulation. Nheyo yeyakananga chikamu modulation ndeye kushandisa modulating siginecha kushandura zvakananga ma parameter eiyo resonant loop, kuitira kuti inotakura chiratidzo kuburikidza neresonant loop ibudise chikamu chekuchinja uye kugadzira chikamu modulation wave; Iyo isina kunanga chikamu modulation nzira yekutanga inogadzirisa amplitude yeiyo modulated wave, uyezve inoshandura shanduko yeamplitude kuita shanduko yechikamu, kuitira kuti uwane iyo chikamu modulation. Iyi nzira yakagadzirwa naArmstrong muna 1933, inonzi Armstrong modulation method
Iyo yemagetsi inodzorwa microwave phase shifter ndeye maviri-port network inoshandiswa kupa mutsauko wechikamu pakati pezvinobuda nekuisa masaini anogona kudzorwa nechiratidzo chekudzora (kazhinji DC bias voltage). Huwandu hwekuchinja kwechikamu hunogona kuenderera mberi nechiratidzo chekudzora kana pane yakatarwa discrete kukosha. Ivo vanonzi analog phase shifters uye digital phase shifters zvichiteerana. Iyo phase modulator ibhinari phase shift keying modulator mu microwave communication system, iyo inoshandisa inoenderera square wave kugadzirisa iyo inotakura chiratidzo. Sine wave phase modulation inogona kukamurwa kuita yakananga chikamu modulation uye isina kunanga chikamu modulation. Nekushandisa hukama hwekuti sine wave amplitude Angle inosanganisirwa yekukurumidza frequency, frequency modulated wave inogona kushandurwa kuita chikamu modulated wave (kana zvinopesana). Iyo inonyanya kushandiswa yakananga chikamu modulator dunhu ndiyo varactor diode phase modulator. Iyo indirect phase modulation circuit yakanyanya kuoma kupfuura yakananga chikamu modulation circuit. Nheyo yayo ndeyokuti imwe nzira yechiratidzo chekutakura inoshandurwa ne90 ° phase shifter uye inopinda mukuenzanisa amplitude-modulator kudzvinyirira amplitude modulation yemutakuri. Mushure mekudzivirira kwakaringana, chiratidzo chakawanikwa chinowedzerwa kune imwe nzira yemutakuri kuburitsa iyo amplitude-modulating chiratidzo. Iyi dunhu inoratidzirwa nekugadzikana kwepamusoro, asi shanduko yechikamu haigone kuve yakakura kwazvo (kazhinji isingasviki 15 °) kana kukanganisa kwakakomba. Yakareruka chikamu modulator inowanzoshandiswa muFM nhepfenyuro transmitters.
