FMUSER RF Power Amplifier Voltage Test Bench maka AM Transmitter Power Amplifier (PA) na Nnwale Amplifier.

RF Power Amplifier Board Testing | Ngwọta ọrụ AM sitere na FMUSER

 

Igwe ọkụ ọkụ RF na ihe nkwuputa ihe bụ akụkụ kachasị mkpa nke ndị na-ebufe AM ma na-arụ ọrụ dị mkpa mgbe niile na nhazi mbụ, nnyefe, na nlekọta mgbe emechara.

 

Ihe ndị a bụ isi na-eme ka nnyefe akara RF ziri ezi. Dabere n'ogo ike na ike nke onye na-anata chọrọ iji chọpụta na decode mgbaàmà, mmebi ọ bụla nwere ike ịhapụ ndị mgbasa ozi mgbasa ozi na mgbagha mgbagha, belata ike oriri, na ndị ọzọ.

 

 

Maka mmezigharị na mmezi nke ihe ndị bụ isi nke mgbasa ozi mgbasa ozi, ụfọdụ ngwa nyocha dị mkpa dị mkpa. Ngwọta nha RF nke FMUSER na-enyere gị aka ịchọpụta imewe gị site na arụmọrụ nha RF na-enweghị atụ.

 

Olee otú ọ na-arụ ọrụ

 

A na-ejikarị ya eme nnwale mgbe enweghị ike ịnwapụta bọọdụ ampilifaya ike na bọọdụ ampilifaya nke AM transmitter ka emezichara ya.

 

 

atụmatụ

 

• Ike ọkọnọ nke bench ule bụ AC220V, na panel nwere mgba ọkụ ọkụ. N'ime ime -5v, 40v, na 30v na-enye site na ọkụ na-agbanwe agbanwe.
• E nwere ihe nleba anya mmepụta Q9 n'akụkụ elu nke bench ule: J1 na J2, ike ampilifaya mmepụta ule Q9 interfaces: J1 na J2, na ike amplifier voltaji egosi (59C23). J1 na J2 jikọtara ya na oscilloscope jikọtara ọnụ abụọ.
• Akụkụ aka ekpe nke akụkụ ala nke bench ule bụ ọnọdụ nyocha njupụta nke buffer, na akụkụ aka nri bụ ule ampilifaya osisi.

 

ntuziaka

 

• J1: Nyochaa ngbanwe ọkụ
• S1: Nnwale bọọdụ amplifier na ihe ngbanwe ihe nlele ule bọọdụ
• S3/S4: Ntụnye mgbama mgbanaka aka ekpe na aka nri ma ọ bụ gbanyụọ nhọrọ.

 

RF Power Amplifier: kedu ihe ọ bụ na otu o si arụ ọrụ?

 

N'ebe redio, ihe nrịbawanye ike RF (RF PA), ma ọ bụ ụda ike redio bụ ngwa eletrọnịkị a na-ejikarị eme ka ọ dị elu ma wepụta ọdịnaya ntinye, nke a na-egosipụtakarị dị ka voltaji ma ọ bụ ike, ebe ọrụ RF power amplifier bụ ibuli elu. ihe ndị ọ "na-amịpụta" ruo n'ókè ụfọdụ ma "bupụ ya n'èzí."

 

Olee otu o si aru oru?

 

Ọtụtụ mgbe, a na-ewunye ihe nrịbawanye ike RF n'ime onye na-ebufe ya n'ụdị bọọdụ sekit. N'ezie, ụda ike RF nwekwara ike ịbụ ngwaọrụ dị iche iche ejikọrọ na mmepụta nke ihe na-emepụta ihe dị ala site na eriri coaxial. N'ihi oke ohere, ọ bụrụ na ị nwere mmasị, welcome Hapụ ikwu ma m ga-emelite ya otu ụbọchị n'ọdịnihu :).

 

Ihe dị n'ịkwalite ike RF bụ inweta ike mmepụta RF zuru oke. Nke a bụ n'ihi na, nke mbụ, na sekit nke dị n'ihu nke onye na-ebufe ya, mgbe abanyechara mgbaàmà ọdịyo sitere na ngwaọrụ isi iyi site na ahịrị data, a ga-agbanwe ya ka ọ bụrụ akara ngosi RF na-adịghị ike site na modulation, mana ndị a adịghị ike. akara ezughị ezu iji zute mkpuchi mgbasa ozi buru ibu. Ya mere, akara ngosi RF ndị a gbanwetụrụ na-aga n'usoro nkwalite (nkwakọ ebe nchekwa, ọkwa nrịbawanye etiti, ọkwa nkwalite ike ikpeazụ) site na RF power amplifier ruo mgbe ọ na-abawanye na ike zuru oke wee gafere na netwọk dakọtara. N'ikpeazụ, enwere ike inye ya nri na antenna ma gbanye ya.

 

Maka ọrụ nnata, onye na-ebugharị ma ọ bụ onye na-anata ihe nwere ike ịnwe ngbanwe n'ime ma ọ bụ mpụga nnyefe / nnata (T / R). Ọrụ nke ngbanwe T/R bụ ịgbanwee antenna gaa na onye na-ebufe ma ọ bụ nnata ka ọ dị mkpa.

 

Kedu ihe bụ ntọala ntọala nke RF Power Amplifier?

 

Ihe ngosi teknụzụ bụ isi nke amplifiers ike RF bụ ike mmepụta na arụmọrụ. Otu esi emeziwanye ike mmepụta na arụmọrụ bụ isi ihe ebumnuche imewe nke ndị na-amụba ike RF.

 

Igwe ọkụ ọkụ RF nwere oge arụ ọrụ akọwapụtara nke ọma, yana oge ọrụ ahọpụtara ga-adịrịrị n'ime oke ugboro ya. Maka oge na-arụ ọrụ nke megahertz 150 (MHz), ihe nrịbawanye ike RF dị na nso 145 ruo 155 MHz ga-adabara. Igwe nkwuputa ike RF nwere oke ugboro nke 165 ruo 175 MHz agaghị enwe ike ịrụ ọrụ na 150 MHz.

 

Ọtụtụ mgbe, n'ime amplifier ike RF, sekit LC resonant nwere ike ịhọrọ ugboro ole bụ isi ma ọ bụ otu nkwekọrịta iji nweta nkwalite na-enweghị mgbagha. Na mgbakwunye na nke a, ihe ndị kwekọrọ na mmepụta kwesịrị ịdị ntakịrị ka o kwere mee iji zere nnyonye anya na ọwa ndị ọzọ.

 

Sekit amplifier ike RF nwere ike iji transistor ma ọ bụ sekit agbakwunyere iji mepụta nkwalite. N'ime imewe ampilifaya ike RF, ebumnuche bụ inwe nkwalite zuru oke iji mepụta ike nrụpụta achọrọ, ebe ị na-enye ohere maka nwa oge na obere ndakọrịta n'etiti onye na-ebufe na erimeri na antenna n'onwe ya. Ihe mgbochi nke onye na-enye eri nri na antenna n'onwe ya na-abụkarị 50 ohms.

 

Dị ka o kwesịrị, nchikota antenna na ahịrị ndepụta ga-eweta ihe mgbochi na-eguzogide naanị n'oge ọrụ.

Kedu ihe kpatara RF Power Amplifier ji dị mkpa?

 

Dị ka akụkụ bụ isi nke usoro mgbasa ozi, mkpa nke RF ike amplifier na-apụta ìhè n'onwe ya. Anyị niile maara na onye mgbasa ozi mgbasa ozi ọkachamara na-agụnye akụkụ ndị a:

 

1. Shei siri ike: a na-ejikarị aluminum alloy eme ya, ọnụahịa ahụ dị elu.
2. bọọdụ ntinye ọnụnụ: nke a na-ejikarị nweta ndenye mgbaama sitere na isi iyi, wee jikọọ onye na-ebufe na ebe ọdịyo site na eriri ọdịyo (dịka XLR, 3.45MM, wdg). A na-edobe bọọdụ ntinye ọnụnụ na azụ azụ nke ihe na-ebufe ma bụrụ akụkụ anọ nwere ihe ruru 4:1.
3. Ọkụ ọkụ: A na-eji ya maka ọkụ ọkụ. Mba dị iche iche nwere ụkpụrụ inye ọkụ dị iche iche, dị ka 110V, 220V, wdg N'ụfọdụ ụlọ ọrụ redio buru ibu, ike na-enye ọkụ bụ 3 Phase 4 Wire System (380V/50Hz) dịka ọkọlọtọ. Ọ bụkwa ala ụlọ ọrụ mmepụta ihe dịka ọkọlọtọ, nke dị iche na ọkọlọtọ ọkụ eletrik nke obodo.
4. Ogwe njikwa na modulator: na-adịkarị n'ọnọdụ kacha pụta ìhè n'ihu panel nke transmitter, nke mejupụtara panel nrụnye na ụfọdụ igodo ọrụ (nkụkọ, igodo njikwa, ihuenyo ngosi, wdg), nke a na-ejikarị eme ihe iji gbanwee mgbama ntinye ọdịyo. n'ime akara RF (dị oke ike).
5. RF power amplifier: na-ezokarị aka na bọọdụ ampilifaya ike, nke a na-ejikarị eme ka ntinye mgbama RF na-adịghị ike sitere na akụkụ modulation. Ọ nwere PCB na usoro etchings dị mgbagwoju anya (dị ka ahịrị ntinye RF, mgbaaka amplifier, nzacha, wdg), yana Ejikọtara ya na sistemu nri erimeri site na nrụpụta RF.
6. Ọkụ ọkụ na fan: A na-eme nkọwapụta ndị a site n'aka ndị nrụpụta transmitter, nke a na-ejikarị maka ọkọnọ ike na mgbasa ọkụ.

 

N'ime ha, RF power amplifier bụ isi ihe kachasị, nke kachasị ọnụ na nke kachasị mfe ọkụ nke onye na-ebufe ya, bụ nke a na-ekpebi site na otu o si arụ ọrụ: mmepụta nke RF amplifier ike na-ejikọta ya na antenna mpụga.

 

Ọtụtụ antennas nwere ike na-ege ntị nke mere na mgbe ejikọrọ na feeder, ha na-enye kasị mma impedance maka transmitter. Achọrọ ndakọrịta impedance a maka mbufe ike kachasị site na nnyefe gaa na antenna. Antenna nwere njiri mara dịtụ iche n'ogo ugboro. Nnwale dị mkpa bụ ịhụ na ike egosipụtara site na antenna gaa na onye na-enye nri na azụ na onye na-ebufe dị ala. Mgbe nkwekọrịta impedance dị oke elu, ike RF ezigara na antenna nwere ike ịlaghachi na onye na-ebufe ya, na-ekepụta oke ebili mmiri dị elu (SWR), na-eme ka ikike nnyefe nọrọ na amplifier RF, na-eme ka ikpo ọkụ na ọbụna mebie arụ ọrụ. components.

 

Ọ bụrụ na amplifier nwere ike ịrụ ọrụ nke ọma, mgbe ahụ, ọ nwere ike inye aka karịa, nke na-egosipụta "uru" nke ya, ma ọ bụrụ na enwere nsogbu ụfọdụ na amplifier, mgbe ahụ mgbe ịmalitere ịrụ ọrụ ma ọ bụ na-arụ ọrụ ruo oge ụfọdụ, ọ bụghị naanị na ọ nweghị ike. Ogologo oge inye "onyinye" ọ bụla, mana enwere ike ịnwe ụfọdụ "ujo" na-atụghị anya ya. "Ụjọ" dị otú ahụ na-emebi ụwa n'èzí ma ọ bụ amplifier n'onwe ya.

 

Ampilifaya buffer: kedu ihe ọ bụ yana otu o si arụ ọrụ?

 

A na-eji amplifiers buffer na mgbasa ozi AM.

 

Onye na-ebufe AM nwere oscillator oscillator, ihe nkpuchi na ọtụtụ ọkwa, ọkwa ọkwọ ụgbọ ala, na ogbo modulator, ebe isi oscillator na-enye ike ihe nkwuputa ihe, na-esote ọkwa nchekwa.

 

A na-akpọ ogbo dị n'akụkụ oscillator ihe nkpuchi ma ọ bụ ihe nkpuchi (mgbe ụfọdụ a na-akpọ ya buffer) - nke a na-akpọ ya n'ihi na ọ na-ekewapụ oscillator na igwe na-amụba ike.

 

Dị ka Wikipedia si kwuo, ihe nrịbawanye ihe bụ ihe ngbanwe nke na-enye ntụgharị ọkụ eletrik site n'otu sekit gaa na nke ọzọ iji chebe mgbama sitere na ihe ọ bụla dị ugbu a (ma ọ bụ voltaji, maka ihe nchekwa dị ugbu a) nke ibu nwere ike ịmepụta.

 

N'ezie, n'akụkụ onye na-ebufe ihe, a na-eji ihe nkwụnye ọkụ na-ekewapụ isi oscillator site na ọkwa ndị ọzọ nke transmitter, na-enweghị ihe nchekwa, ozugbo ụda ike gbanwere, ọ ga-atụgharị azụ na oscillator wee mee ka ọ gbanwee ugboro ole. ma ọ bụrụ na oscillation Ọ bụrụ na nnyefe na-agbanwe ugboro ole, onye nnata ga-atụfu kọntaktị na nnyefe ma nata ozi ezughị ezu.

 

Olee otu o si aru oru?

 

Isi oscillator dị na onye na-ebufe AM na-arụpụta ugboro ụgbọ mmiri sub-harmonic kwụsiri ike. A na-eji oscillator kristal mepụta oscillation sub-harmonic a kwụsiri ike. Mgbe nke ahụ gasịrị, a na-abawanye ugboro ugboro na uru a chọrọ site na generator harmonic. Ugboro ugboro nke ebu kwesịrị ị kwụsi ike. Mgbanwe ọ bụla na ugboro a nwere ike bute nnyonye anya na ọdụ ụgbọ mmiri ndị ọzọ. N'ihi ya, onye nnata ga-anabata mmemme site n'ọtụtụ nnyefe.

 

Igwe a na-emegharị emegharị nke na-enye impedance dị elu na ugboro oscillator bụ isi ihe na-emepụta ihe. Ọ na-enyere aka igbochi mgbanwe ọ bụla na ibu ugbu a. N'ihi nnukwu ntinye ntinye ya na oge ọrụ nke isi oscillator, mgbanwe anaghị emetụta isi oscillator. Ya mere, ihe nkwụnye ihe na-ewepụta oscillator na-ekewapụ isi oscillator na ọkwa ndị ọzọ ka mmetụta ntinye ghara ịgbanwe ugboro nke oscillator isi.

 

RF Power Amplifier Test Bench: Ihe ọ bụ na otu o si arụ ọrụ

 

Okwu a bụ "bench test" na-eji asụsụ nkọwa ngwaike n'ụdị dijitalụ kọwaa koodu ule na-ewepụta DUT ozugbo wee na-agba ule.

 

Nwalee Bench

 

Oche ule ma ọ bụ bench ule bụ gburugburu a na-eji iji nyochaa izi ezi ma ọ bụ ịdị ọcha nke imewe ma ọ bụ ihe nlereanya.

 

Okwu a sitere na nnwale nke ngwa eletrọnịkị, ebe onye injinia ga-anọdụ ala n'oche ụlọ nyocha, jide nha na ngwaọrụ eji arụ ọrụ dị ka oscilloscopes, multimeters, igwe na-ere ere, ndị na-akpụ waya, wdg, wee jiri aka chọpụta izi ezi nke ngwaọrụ ahụ n'okpuru ule. (DUT).

 

N'ihe gbasara sọftụwia ma ọ bụ firmware ma ọ bụ injinịa ngwaike, bench ule bụ gburugburu ebe a na-anwale ngwaahịa a na-emepe site na enyemaka nke ngwa na ngwa ngwa. N'ọnọdụ ụfọdụ, ngwanro ahụ nwere ike ịchọ obere mgbanwe ka ọ na-arụ ọrụ na testbench, mana itinye nlezianya anya na-achọpụta na enwere ike ịmegharị mgbanwe n'ụzọ dị mfe na enweghị mmechi ọ bụla ewebata.

 

Ihe ọzọ pụtara "ihe ndina ule" bụ ebe dịpụrụ adịpụ, na-achịkwa gburugburu ebe obibi, dị nnọọ ka a mmepụta gburugburu ebe obibi, ma ọ bụghị zoo ma ọ bụ na-ahụ anya na ọha na eze, ndị ahịa, wdg. Ya mere ọ dị mma ime mgbanwe dị ka ọ dịghị ọgwụgwụ ọrụ na-etinye aka.

 

Ngwaọrụ RF n'okpuru Ule (DUT)

 

Ngwaọrụ n'okpuru ule (DUT) bụ ngwaọrụ a nwalere iji chọpụta ịrụ ọrụ na nka. DUT nwekwara ike ịbụ akụkụ nke modul ma ọ bụ unit buru ibu nke a na-akpọ unit under test (UUT). Lelee DUT maka ntụpọ iji hụ na ngwaọrụ ahụ na-arụ ọrụ nke ọma. Emebere ule a iji gbochie ngwaọrụ mebiri emebi iru n'ahịa, nke nwekwara ike ibelata ọnụ ahịa nrụpụta.

 

Ngwaọrụ nọ n'okpuru ule (DUT), nke a makwaara dị ka ngwaọrụ n'okpuru ule (EUT) na otu n'okpuru ule (UUT), bụ nyocha ngwaahịa arụpụtara nke a na-anwale mgbe mbụ arụpụtara ya ma ọ bụ emesịa na usoro ndụ ya dị ka akụkụ nke ule ọrụ na-aga n'ihu. na calibration. Nke a nwere ike ịgụnye nnwale nrụzi ka emechara iji chọpụta ma ngwaahịa a na-arụ ọrụ na nkọwapụta ngwaahịa mbụ.

 

N'ime ule semiconductor, ngwaọrụ a na-anwale bụ ịnwụ na wafer ma ọ bụ akụkụ ikpeazụ. Iji sistemụ njikọ, jikọọ akụrụngwa na akụrụngwa nnwale akpaka ma ọ bụ ntuziaka. Ngwa nnwale ahụ na-enye ike akụrụngwa, na-enye akara mkpali, ma tụọ ma nyochaa mmepụta nke akụrụngwa. N'ụzọ dị otu a, onye nnwale na-ekpebi ma otu ngwaọrụ a na-anwale ọ dabara nkọwapụta ngwaọrụ.

 

Na mkpokọta, RF DUT nwere ike ịbụ imewe sekit yana nchikota ọ bụla yana ọnụọgụ analog na RF components, transistor, resistors, capacitors, wdg, dabara maka ịme anwansị na Agilent Circuit Envelope Simulator. Sekit RF gbagwojuru anya ga-ewe ogologo oge iji megharịa ma rie ọtụtụ ebe nchekwa.

 

Enwere ike icheta oge ịme anwansị Testbench na ihe nchekwa chọrọ dị ka ngwakọta nke nha testbench benchmark yana ihe achọrọ nke sekit RF kacha dị mfe yana ihe simulation envelopu sekit chọrọ nke mmasị RF DUT.

 

Enwere ike iji RF DUT ejikọrọ na bench ule ikuku na-ejikarị oche ule mee nha ndabara site na ịtọ ntọala bench ule. Ntọala nha ọzịza dị maka ụdị RF DUT:

 

• Ihe nrịbama ntinye (RF) nwere igwe na-ebu redio mgbe niile ka achọrọ. Nsonaazụ nke bench ule isi iyi mgbama RF anaghị ewepụta akara RF nke ihe na-ebu RF na-adị iche na oge. Agbanyeghị, bench ule ga-akwado mgbama mmepụta nwere usoro ihe na-ebu RF na mgbanwe ugboro, nke enwere ike ịnọchite anya mgbanwe I na Q kwesịrị ekwesị n'otu oge na-ebu RF mgbe niile.
• A na-emepụta mgbama mmepụta nke nwere ugboro ndị na-ebu RF mgbe niile. Mgbama ntinye bench ule agaghị enwe ugboro ugboro nke ugboro ya dịgasị iche n'oge. Agbanyeghị, bench ule ga-akwado akara ntinye nke nwere mkpọtụ usoro ihe RF ma ọ bụ mgbanwe Doppler na-agbanwe oge nke onye na-ebu RF. A na-atụ anya na ọ ga-anọchi anya mgbagha mgbaama ndị a site na mgbanwe envelopu I na Q dabara adaba n'otu oge na-ebu RF mgbe niile.
• Ihe nrịbama ntinye sitere na igwe na-emepụta mgbama nwere nguzogide isi iyi 50-ohm.
• Achọrọ mgbama ntinye na-enweghị enyo enyo.
• Mepụta mgbama mmepụta nke chọrọ ihe mgbochi ibu mpụga nke 50 ohms.
• Na-emepụta mgbama mmepụta na-enweghị spectral mirroring.
• Dabere na bench ule iji mee nzacha mgbama bandpas ọ bụla metụtara nha nke mgbama mmepụta RF DUT.

 

AM Transmitter Basics I Kwesịrị Ịmara

 

A na-akpọ onye na-ebunye ihe na-ebunye mgbama AM AM transmitter. A na-eji ndị na-ebugharị ndị a na igwe mgbasa ozi AM (MW) na obere ebili mmiri (SW). MW band nwere frequencies n'etiti 550 kHz na 1650 kHz na SW band nwere ugboro site 3 MHz ka 30 MHz.

 

Ụdị abụọ nke mgbasa ozi AM ejiri dabere na ike nnyefe bụ:

 

1. akwa ọkwa
2. obere ọkwa

 

Ndị na-ebufe ọkwa dị elu na-eji modulation dị elu, na ndị na-ebufe ọkwa dị ala na-eji mgbanaka dị ala. Nhọrọ n'etiti atụmatụ modulation abụọ ahụ dabere na ike nnyefe nke AM transmitter. Na mgbasa ozi mgbasa ozi nke ike nnyefe nwere ike ịdị n'usoro nke kilowatts, a na-eji nhazi ọkwa dị elu. N'ime ndị na-ebufe obere ike nke na-achọ naanị watts ole na ole nke ike nnyefe, a na-eji nhazi ọkwa dị ala.

 

Ndị na-ebufe elu na nke dị ala

 

Ọnụ ọgụgụ dị n'okpuru na-egosi eserese ngọngọ nke ndị na-ebufe ọkwa dị elu na nke dị ala. Ihe dị iche iche dị n'etiti ndị na-ebufe abụọ bụ mmụba ike nke onye na-ebu ya na akara gbanwetụrụ.

 

Ọgụgụ (a) na-egosi eserese ngọngọ nke mgbasa ozi AM dị elu.

 

A na-ese foto (a) maka nnyefe ọdịyo. Na nnyefe ọkwa dị elu, a na-emewanye ike nke onye na-ebu ya na akara ngosi gbanwetụrụ tupu etinye ya na modulator ogbo, dị ka egosiri na Figure (a). Na ngbanwe dị ala, ike nke akara ntinye abụọ na ọkwa modulator adịghị abawanye. A na-enweta ike nnyefe achọrọ site na ọkwa ikpeazụ nke onye na-ebufe ya, ihe nrịbama ike Klas C.

 

Akụkụ nke eserese (a) bụ:

 

1. Oscillator ụgbọelu
2. Ampilifaya buffer
3. Ọtụtụ ugboro
4. Ike Amplifier
5. Chain ọdịyo
6. Amụbawanye ike Klas C
7. Oscillator ụgbọelu

 

Onye na-ebu oscillator na-ewepụta mgbama ebu na oke ọnụọgụ redio. Ugboro nke onye na-ebu ya na-adị elu mgbe niile. Ebe ọ bụ na ọ siri ike ịmepụta frequencies dị elu yana ezigbo nkwụsi ike ugboro ugboro, oscillators na-ebu ibu na-emepụta submultiples na ugboro ole achọrọ. A na-amụba sub-octave a site n'ọkwa na-ebuwanye ibu iji nweta ugboro ole ebu chọrọ. Ọzọkwa, enwere ike iji oscillator kristal mee ihe n'oge a iji mepụta ụgbọ ala dị ala na nkwụsi ike kachasị mma. Ọkwa ịgbasa ugboro ugboro wee na-abawanye ugboro nke ebu ruo uru ọ chọrọ.

 

Ihe nchekwa Amp

 

Ebumnobi nke ampilifaya buffer bụ okpukpu abụọ. Ọ na-ebu ụzọ kwekọọ mmepụta ihe mmepụta nke oscillator ụgbọelu na ntinye ntinye nke ọnụọgụ ugboro ugboro, ọkwa na-esote nke oscillator ụgbọelu. Ọ na-ekewapụ oscillator ụgbọelu na ugboro ugboro.

 

Nke a dị mkpa ka onye na-ebuwanye ibu ghara ịdọrọ nnukwu iyi site na oscillator ụgbọelu. Ọ bụrụ na nke a emee, ugboro nke oscillator ebu agaghị eguzosi ike.

 

Ọtụtụ ugboro

 

A na-etinye ugboro ugboro nke mgbama ụgbọ ala nke oscillator nke ụgbọelu na-emepụta ugbu a na ọnụọgụ ugboro site na nkwuputa ihe. A na-akpọkwa ọkwa a dị ka ihe na-emepụta ihe na-emekọ ihe. Ọtụtụ ugboro na-arụpụta harmonics dị elu nke ugboro oscillator ebu. Mgbasa mgbasa ozi ugboro bụ sekit a na-ege ntị nke na-adagharị ugboro ugboro nke a chọrọ ka ebufe ya.

 

Ike Amp

 

A na-emeziwanye ike nke mgbaama ụgbọelu n'ọkwa mgbama ọkụ. Nke a bụ isi ihe achọrọ maka nnyefe ọkwa dị elu. Klas C ike amplifiers na-enye ike dị ugbu a pulses nke ihe mgbaàmà na-ebupụta ha.

Chain ọdịyo

 

A na-enweta mgbaàmà ọdịyo a ga-ebunye site na igwe okwu dịka egosiri na eserese (a). Igwe ọkụ ọkwọ ụgbọ ala ọdịyo na-eme ka voltaji nke mgbaama a na-amụba. Nkwalite a dị mkpa iji kwọọ ihe nrịbawanye ike ọdịyo. Na-esote, ihe nkwalite ike Klas A ma ọ bụ klaasị B na-abawanye ike nke mgbama ọdịyo.

 

Klas C Amplifier Modulated

 

Nke a bụ ọkwa mmepụta nke transmitter. A na-etinye akara ngosi ọdịyo a gbanwegharịrị na mgbama ụgbọ n'ọkwa mgbanwe a ka nkwalite ike gasịrị. Mgbanwe ahụ na-eme n'oge a. Igwe ọkụ klaasị C na-ebuli ike nke mgbama AM na ike mbufe enwetaghachiri. A na-agafe akara ngosi a na antenna, nke na-eme ka mgbaàmà ahụ banye n'ime oghere nnyefe.

 

Ọnụọgụ (b): Eserese ngọngọ AM dị ala

 

Mbufe AM dị ala nke egosiri na eserese (b) yiri onye na-ebufe ọkwa dị elu ma ewezuga na ike nke ihe na-ebu ya na akara ọdịyo adịghị abawanye. A na-etinye nrịbama abụọ a ozugbo na klaasị C ike amplifier gbanwetụrụ.

 

Mgbanwe a na-eme n'oge usoro a, na ike nke mgbama a gbanwere ka ọ dị elu n'ogo mbufe achọrọ. Igwe na-ebunye mgbe ahụ na-ebufe mgbaàmà.

 

Njikọta ọkwa mmepụta na antenna

 

Ọkwa mmepụta nke klaasị C ike amplifier na-enye mgbama na antenna mbufe. Iji nyefee ike kachasị site na ọkwa mmepụta gaa na antenna, ihe mgbochi nke ngalaba abụọ ahụ ga-adakọrịrị. Maka nke a, achọrọ netwọk dakọtara. Egwuregwu dị n'etiti ha abụọ kwesịrị ịdị mma n'oge ọ bụla na-ebufe ugboro. Ebe ọ bụ na a chọrọ nhata na ugboro dị iche iche, a na-eji inductor na capacitors na-enye ihe mgbochi dị iche iche na ugboro dị iche iche na netwọk dakọtara.

 

A ghaghị ịrụ netwọk dakọtara site na iji ngwa ngwa ndị a. Dị ka e gosiri na foto (c) n'okpuru.

 

Onyonyo (c): netwọk jikọtara Pi abụọ

 

Netwọk dakọtara eji ejikọta ọkwa mmepụta ihe na antenna ka a na-akpọ netwọkụ dual π. Egosiri netwọkụ na eserese (c). Ọ mejupụtara abụọ inductors L1 na L2 na abụọ capacitors C1 na C2. A na-ahọrọ ụkpụrụ nke akụrụngwa ndị a ka ntinye ntinye nke netwọk dị n'etiti 1 na 1'. A na-egosi ọnụọgụ (c) ka ọ dabara na mmegide mmepụta nke ọkwa mmepụta ihe. Ọzọkwa, ihe nrụpụta nke netwọkụ ahụ dabara na impedance nke antenna.

 

Netwọk dakọtara okpukpu abụọ π na-ehichapụkwa ihe ndị na-achọghị ugboro ole na-apụta na mpụta nke ọkwa ikpeazụ nke nnyefe. Nsonaazụ nke klaasị C ike amplifier nwere ike ịnwe harmonics dị elu na-adịghị mma nke ukwuu, dị ka nkwekọrịta nke abụọ na nke atọ. Nzaghachi ugboro ugboro nke netwọk dakọtara ka atọrọ ka ọ jụ kpamkpam nkwekọ dị elu ndị a na-achọghị yana naanị akara achọrọ ka ejikọta ya na antenna.