PIM, inozivikanwawo sePassive Intermodulation, imhando yekukanganisa kwechiratidzo.Sezvo maLTE network achinyanya kutarisisa kuPIM, maitiro ekuona uye kuderedza PIM yakagamuchira kutariswa kwakawanda.
PIM inogadzirwa neasina mutsara musanganiswa pakati peaviri kana anopfuura anotakura ma frequency, uye inoguma chiratidzo ine mamwe ma frequency asingadiwe kana intermodulation zvigadzirwa.Sezvo izwi rekuti "passive" muzita rekuti "passive intermodulation" rinoreva zvakafanana, iyo yataurwa pamusoro isina mutsara musanganiswa unokonzera PIM haisanganisi midziyo inoshanda, asi inowanzo gadzirwa nesimbi uye yakabatana michina.Maitiro, kana zvimwe zvinhu zvinongoitwa muhurongwa.Zvikonzero zvekusanganisa zvisina tsarukano zvinogona kusanganisira zvinotevera:
• Kukanganisa mukubatana kwemagetsi: Sezvo pasina nzvimbo isina chikanganiso yakatsetseka munyika, panogona kunge kune nzvimbo dzine huwandu hwepamusoro huripo munzvimbo dzekusangana pakati pezvakasiyana.Izvi zvikamu zvinoburitsa kupisa nekuda kweiyo shoma conductive nzira, zvichikonzera shanduko mukupikisa.Nechikonzero ichi, chinongedzo chinofanirwa kugara chakanyatso kusimbiswa kune chinongedzo torque.
• Inenge imwe yakaonda oxide layer iripo pane yakawanda simbi, izvo zvinogona kukonzera tunneling mhedzisiro kana, muchidimbu, kutungamirira mukuderedza conductive nzvimbo.Vamwe vanhu vanofunga kuti chiitiko ichi chinogona kubudisa Schottky effect.Ichi ndicho chikonzero mabhaudhi ane ngura kana matenga esimbi ane ngura padyo nenharembozha anogona kukonzera yakasimba PIM yekukanganisa masaini.
• Ferromagnetic zvinhu: Zvishandiso zvakadai sesimbi zvinogona kubudisa kukanganisa kukuru kwePIM, saka zvinhu zvakadaro hazvifaniri kushandiswa mumaserura emagetsi.
Wireless network dzave dzakanyanya kuomarara sezvo akawanda masisitimu uye zvizvarwa zvakasiyana zvemasisitimu zvatanga kushandiswa mukati mesaiti imwechete.Kana zviratidzo zvakasiyana-siyana zvabatanidzwa, PIM, iyo inokonzera kukanganisa kune LTE chiratidzo, inogadzirwa.Antennas, duplexers, tambo, tsvina kana yakasununguka yekubatanidza, uye yakakuvadzwa RF michina uye zvinhu zvesimbi zviri padyo kana mukati meserura base station zvinogona kunge zviri zvitubu zvePIM.
Sezvo kupindira kwePIM kuchigona kukanganisa zvakanyanya pakuita kweLTE network, vashandisi vasina waya uye makondirakiti vanoisa kukosha kukuru kune kuyerwa kwePIM, kunobva nzvimbo uye kudzvinyirira.Inogamuchirwa PIM mazinga anosiyana kubva kune system kuenda kune system.Semuyenzaniso, mhedzisiro yebvunzo yaAnritsu inoratidza kuti kana iyo PIM level ikawedzera kubva -125dBm kuenda -105dBm, yekurodha yekumhanyisa inodonha ne18%, nepo yekutanga neyekupedzisira Maitiro ese ari maviri anoonekwa seanogamuchirika PIM mazinga.
Ndezvipi zvikamu zvinoda kuongororwa PIM?
Kazhinji, chikamu chega chega chinopinda bvunzo yePIM panguva yekugadzira uye kugadzira kuti ive nechokwadi chekuti haizove yakakosha sosi yePIM mushure mekuiswa.Mukuwedzera, sezvo iko kurongeka kwekubatanidza kwakakosha kuPIM kutonga, iyo yekuisa maitiro zvakare chikamu chakakosha chePIM kutonga.Mune yakagoverwa antenna system, dzimwe nguva inofanirwa kuita PIM bvunzo pane yese system pamwe nePIM yekuyedza pane chimwe nechimwe chikamu.Nhasi, vanhu vari kuwedzera kutora michina yakasimbiswa nePIM.Semuenzaniso, antennas pazasi -150dBc inogona kutorwa sePIM kutevedzera, uye zvirevo zvakadaro zviri kuwedzera kuomarara.
Pamusoro peizvi, iyo saiti yekusarudza maitiro eiyo cellular saiti, kunyanya pamberi peserura saiti uye antenna kumisikidzwa, uye inotevera yekuisa chikamu, inosanganisirawo PIM kuongororwa.
Kingtone inopa yakaderera PIM tambo maassemblies, connectors, adapters, multi-frequency combiners, co-frequency combiners, duplexers, splitters, couplers uye antennas kuti isangane nezvimwe zvakasiyana-siyana zvinoenderana nePIM.
Nguva yekutumira: Feb-02-2021