Nūhou

Kānana hana ʻole, i ʻike ʻia hoʻi ʻo ka kānana LC, he kaapuni kānana i haku ʻia me ka inductance, capacitance a me ke kū'ē, hiki ke kānana i hoʻokahi a ʻoi aku paha nā harmonics. ʻO ke ʻano kānana passive maʻamau a maʻalahi hoʻi e hoʻohana, ʻo ia ka hoʻohui ʻana i ka inductance a me ka capacitance ma ke ʻano moʻo, hiki ke hana i kahi bypass impedance haʻahaʻa no nā harmonics nui (3, 5 a me 7); ʻO ka kānana i hoʻonohonoho ʻia hoʻokahi, ka kānana i hoʻonohonoho ʻia pālua a me ka kānana pass kiʻekiʻe he mau kānana passive āpau.
pono
Loaʻa i ka kānana passive nā pono o ke ʻano maʻalahi, ke kumukūʻai haʻahaʻa, ka hilinaʻi hana kiʻekiʻe a me ke kumukūʻai hana haʻahaʻa. Hoʻohana nui ʻia ia ma ke ʻano he ʻano hoʻomalu harmonic.
hoʻokaʻawale ʻana
Pono nā ʻano o ka kānana LC e hoʻokō i nā koi kuhikuhi loea i kuhikuhi ʻia. ʻO kēia mau koi loea ka hana maʻamau i ka attenuation hana ma ke alapine alapine, a i ʻole ka neʻe ʻana o ka pae, a i ʻole nā ​​​​mea ʻelua; I kekahi manawa, ua manaʻo ʻia nā koi pane manawa ma ke kikowaena manawa. Hiki ke hoʻokaʻawale ʻia nā kānana passive i ʻelua mau ʻāpana: nā kānana i hoʻonohonoho ʻia a me nā kānana pass kiʻekiʻe. I ka manawa like, e like me nā ʻano hoʻolālā like ʻole, hiki ke hoʻokaʻawale ʻia i ke kānana parameter kiʻi a me ke kānana parameter hana.
Kānana hoʻonohonoho
Hoʻokomo pū ka kānana hoʻonohonoho i kahi kānana hoʻonohonoho hoʻokahi a me kahi kānana hoʻonohonoho pālua, hiki ke kānana i hoʻokahi (hoʻonohonoho hoʻokahi) a i ʻole ʻelua (hoʻonohonoho pālua) harmonics. Ua kapa ʻia ke alapine (frequency) o nā harmonics ʻo ke alapine resonant o ke kānana hoʻonohonoho.
Kānana hala kiʻekiʻe
ʻO ka kānana pass kiʻekiʻe, i ʻike ʻia hoʻi he kānana hoʻemi amplitude, ʻo ia hoʻi ka kānana pass kiʻekiʻe mua, ka kānana pass kiʻekiʻe lua, ka kānana pass kiʻekiʻe ʻekolu a me ke kānana ʻano C, i hoʻohana ʻia e hoʻēmi nui i nā harmonics ma lalo o kekahi alapine (frequency), i kapa ʻia ʻo ke alapine ʻoki o ke kānana pass kiʻekiʻe.
Kānana palena kiʻi
Ua hoʻolālā ʻia a hoʻokō ʻia ke kānana ma muli o ke kumumanaʻo o nā palena kiʻi. Ua haku ʻia kēia kānana me kekahi mau ʻāpana kumu (a i ʻole hapalua ʻāpana) i hoʻokaʻawale ʻia e like me ke kumumanaʻo o ka impedance kiʻi like ma ka pilina. Hiki ke hoʻokaʻawale ʻia ka ʻāpana kumu i ke ʻano K-paʻa a me ke ʻano m-derived e like me ke ʻano kaapuni. Ma ka lawe ʻana i ka kānana haʻahaʻa LC ma ke ʻano he laʻana, ʻo ka attenuation stopband o ka ʻāpana kumu haʻahaʻa K-paʻa e hoʻonui mau ʻia me ka hoʻonui ʻana o ke alapine; Loaʻa i ka node kumu haʻahaʻa m-derived kahi piko attenuation ma kahi alapine i loko o ka stopband, a ua hoʻomalu ʻia ke kūlana o ka piko attenuation e ka waiwai m ma ka node m-derived. No kahi kānana haʻahaʻa i haku ʻia me nā ʻāpana kumu Cascaded Low-Pass, ua like ka attenuation kūlohelohe me ka huina o ka attenuation kūlohelohe o kēlā me kēia ʻāpana kumu. Ke like ka impedance kūloko a me ka impedance ukana o ka lako mana i hoʻopau ʻia ma nā wēlau ʻelua o ke kānana me ka impedance kiʻi ma nā wēlau ʻelua, ua like ka attenuation hana a me ka neʻe ʻana o ka kānana me ko lākou attenuation kūlohelohe a me ka neʻe ʻana o ka pae. (a) Ua haku ʻia ke kānana i hōʻike ʻia me kahi ʻāpana K paʻa a me ʻelua mau ʻāpana m i loaʻa ma ka cascade. ʻO Z π a me Z π m nā impedance kiʻi. (b) ʻO kona ʻano alapine attenuation. Hoʻoholo ʻia nā kūlana o nā piko attenuation ʻelua /f ∞ 1 a me f ∞ 2 ma ka stopband e nā waiwai m o nā kikowaena m ʻelua i loaʻa.
Pēlā nō, hiki ke haku ʻia nā kānana high pass, band-pass a me band stop me nā ʻāpana kumu like.
ʻAʻole hiki ke like ka impedance kiʻi o ke kānana me ke kū'ē kūloko resistive maʻemaʻe o ka mana a me ka impedance ukana ma ke alapine holoʻokoʻa (ʻoi aku ka nui o ka ʻokoʻa ma ka stopband), a ʻokoʻa loa ka attenuation kūlohelohe a me ka attenuation hana ma ka passband. I mea e hōʻoia ai i ka hoʻokō ʻana o nā ʻōkuhi loea, pono pinepine e mālama i ka palena attenuation kūlohelohe kūpono a hoʻonui i ka laulā passband i ka hoʻolālā.
Kānana palena hana
ʻAʻole i haku ʻia kēia kānana me nā ʻāpana kumu cascaded, akā hoʻohana i nā hana pūnaewele i hiki ke hoʻomaopopo kino ʻia e R, l, C a me nā mea inductance like ʻole e hoʻokokoke pololei i nā kikoʻī loea o ke kānana, a laila hoʻomaopopo i ke kaapuni kānana like e nā hana pūnaewele i loaʻa. Wahi a nā pae hoʻohālikelike like ʻole, hiki ke loaʻa nā hana pūnaewele like ʻole, a hiki ke hoʻomaopopo i nā ʻano kānana like ʻole. (a) ʻO ia ke ʻano o ke kānana haʻahaʻa i hoʻomaopopo ʻia e ka hoʻokokoke ʻana o ka amplitude flattest (bertowitz approximation); ʻO ka passband ka alapine pālahalaha kokoke loa i ka zero, a piʻi ka attenuation monotonically ke hoʻokokoke aku i ka stopband. (c) ʻO ia ke ʻano o ke kānana haʻahaʻa i hoʻomaopopo ʻia e ka hoʻokokoke ʻana o ka ripple like (Chebyshev approximation); ʻO ka attenuation ma ka passband e loli ma waena o ka zero a me ka palena kiʻekiʻe, a piʻi monotonically ma ka stopband. (e) Hoʻohana ia i ka hoʻokokoke ʻana o ka hana elliptic e hoʻomaopopo i nā ʻano o ke kānana haʻahaʻa, a hōʻike ka attenuation i ka loli voltage mau ma ka pass band a me ka stop band. (g) ʻO ke ʻano o ka kānana haʻahaʻa i hoʻomaopopo ʻia e; ʻO ka attenuation i loko o ka passband e loli like ana ma ka amplitude like, a ʻo ka attenuation i loko o ka stopband e loli ana e like me ka piʻi a me ka hāʻule ʻana i koi ʻia e ka index. ʻO (b), (d), (f) a me (H) nā kaapuni pili o kēia mau kānana haʻahaʻa.
ʻO ka maʻamau, loaʻa nā kānana high pass, band-pass a me band stop mai nā kānana low-pass ma o ka hoʻololi alapine (frequency transformation).
Ua hoʻolālā pololei ʻia ke kānana palena hana e ke ʻano synthesis e like me nā koi o nā ʻōkuhi loea, a hiki ke loaʻa i kahi kaapuni kānana me ka hana maikaʻi loa a me ka hoʻokele waiwai,
He maʻalahi ka hana ʻana o ka kānana LC, haʻahaʻa ke kumukūʻai, ākea ka alapine (frequency band), a hoʻohana nui ʻia i ke kamaʻilio ʻana, nā mea kani a me nā kahua ʻē aʻe; I ka manawa like, hoʻohana pinepine ʻia ia ma ke ʻano he prototype hoʻolālā o nā ʻano kānana ʻē aʻe he nui.

Hiki iā mākou ke hoʻopilikino i nā ʻāpana passive rf e like me kāu mau koi. Hiki iā ʻoe ke komo i ka ʻaoʻao hoʻopilikino e hāʻawi i nā kikoʻī āu e pono ai.
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