Huawei base station equipment cavity filter disassembly

littleshrimp

Huawei base station equipment cavity filter disassembly [Copy link]

 

Last time I disassembled a Huawei GRFU multi-carrier base station device. Huawei base station device disassembly - power supply part . There was a cavity filter inside. I disassembled it today. I didn’t expect that it was quite beautiful inside.

In addition to the resonant cavity part, there are also 2 circuit boards inside.

The small board is relatively simple and does not have many components.

Disassembly video:

Huawei base station cavity filter disassembly

btty038

Lightning protection diode

IC爬虫

Is this cavity vaguely gold-plated?

littleshrimp

IC Crawler published on 2022-2-24 14:28 Is this cavity vaguely gold-plated?

Like silver plating?

littleshrimp

btty038 posted on 2022-2-24 14:14 Lightning protection diode

Good eyesight

littleshrimp

btty038 posted on 2022-2-24 14:14 Lightning protection diode

What is the ring on the "spring" below used for?

littleshrimp

littleshrimp posted on 2022-2-24 14:46 What is the ring on the "spring" below used for?

btty038

littleshrimp 发表于 2022-2-24 14:50

It's not to prevent short circuit or something.

btty038

In this frequency band, most cavity filters are silver-plated. They are relatively cheap and have decent specifications.

littleshrimp

btty038 posted on 2022-2-24 15:02 It is not to prevent short circuit or something

What about this skewer-like thing? The metal in the middle seems to be solid.

btty038

littleshrimp posted on 2022-2-24 15:09 What about this skewer-like thing? The metal in the middle seems to be solid.

Narrowband round rod interdigital filter

langtuodianzi

The diode gas discharge tube used is EPCOS.

msmkmm2012

Looks very technological

littleshrimp

btty038 Published on 2022-2-24 15:33 Narrow-band round-rod interdigital filter

I searched for this name and found no similar structure.

btty038

btty038

I also saw it in the paper

btty038

se7ens

Looks very tall

btty038

littleshrimp posted on 2022-2-24 15:09 What about this skewer-like thing? The metal in the middle seems to be solid.

The meaning is similar. Change the name to Tanghulu filter

littleshrimp

btty038 posted on 2022-3-7 12:59 The meaning is similar. Change the name to Tanghulu filter

Thanks for your answer. The name “Tanghulu filter” is good and very descriptive.