Modulator yechikamu (phase modulator) idunhu umo chikamu chewave inotakurwa nechiratidzo chekuchinja. Kune mhando mbiri dze sine wave phase modulation: direct phase modulation uye indirect phase modulation. Nheyo ye direct phase modulation ndeyekushandisa modulating signal kuchinja zvakananga ma parameter e resonant loop, kuitira kuti carrier signal inopinda ne resonant loop igadzire phase shift uye igadzire phase modulation wave; Indirect phase modulation method inotanga yagadzirisa amplitude yewave yakagadziriswa, uye yozoshandura amplitude change kuita phase change, kuitira kuti pave ne phase modulation. Iyi nzira yakagadzirwa naArmstrong muna 1933, inonzi Armstrong modulation method.
Chishandiso che microwave phase shifter chinodzorwa nemagetsi inetwork ine maport maviri inoshandiswa kupa musiyano wechikamu pakati pezviratidzo zvinobuda nezvinopinza zvinogona kudzorwa nechiratidzo chekudzora (kazhinji DC bias voltage). Huwandu hwechikamu chekuchinja hunogona kusiyana nguva dzose nechiratidzo chekudzora kana pamutengo wakatemwa. Zvinonzi analog phase shifters uye digital phase shifters zvakateerana. Chishandiso che phase modulator imodulator ye binary phase shift keying mu microwave communication system, iyo inoshandisa continuous square wave kugadzirisa chiratidzo checarrier. Sine wave phase modulation inogona kukamurwa kuita direct phase modulation uye indirect phase modulation. Nekushandisa hukama hwekuti sine wave amplitude Angle inobatanidzwa ne instantaneous frequency, frequency modulated wave inogona kushandurwa kuita phase modulated wave (kana zvinopesana). Direct phase modulator circuit inonyanya kushandiswa ndiyo varactor diode phase modulator. Indirect phase modulation circuit yakaoma kupfuura direct phase modulation circuit. Nheyo yayo ndeyekuti imwe nzira yechiratidzo checarrier inoshandurwa ne 90° phase shifter uye inopinda mu balanced amplitude-modulator kudzvinyirira amplitude modulation yecarrier. Mushure mekudzikiswa kwakakodzera, chiratidzo chakawanikwa chinowedzerwa kune imwe nzira yemutakuri kuti chibudise chiratidzo che amplitude-modulating. Dunhu iri rinoratidzwa nekugadzikana kwema frequency akawanda, asi kuchinja kwechikamu hakufanirwe kuve kwakakura zvakanyanya (kazhinji pasi pe 15°) kana kukanganisa kwakakomba. Simple phase modulator inowanzoshandiswa muma FM broadcast transmitters.
