Qhov chaw nres nkoj waveguide - lub rooj sib piv qhov loj ntawm flange

Qhov kev sib raug zoo ntawm **qhov ntev ntawm qhov chaw nres nkoj waveguide**, **qhov loj ntawm flange**, thiab **zaus bands** yog tus qauv los xyuas kom meej tias muaj kev sib raug zoo ntawm cov khoom siv thiab kev ua tau zoo tshaj plaws ntawm RF. Hauv qab no yog cov lus sib piv yooj yim thiab cov ntsiab cai tseem ceeb rau cov waveguides rectangular thiab lawv cov flanges cuam tshuam.

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### **Cov Ntsiab Lus Tseem Ceeb**
1. **Lub Npe Waveguide**:
Cov waveguides muaj cim "WR" (Waveguide Rectangular) ua raws li tus lej (piv txwv li, WR-90). Tus lej kwv yees li **qhov ntev ntawm phab ntsa sab hauv** hauv pua feem ntawm ib nti (piv txwv li, WR-90 ≈ 0.90" qhov dav sab hauv).
- Piv txwv li: WR-90 = 0.9" (22.86 mm) qhov dav sab hauv.

2. **Hom Flange**:
Cov flanges ua tus qauv rau kev sib txuas ntawm cov waveguides. Cov hom feem ntau suav nrog:
- **UG/UPC** (MIL-STD): Standardized tub rog flange (eg, UG-387/UPC).
- **CPR** (Lag Luam): Cov qauv European (piv txwv li, CPR-137).
- **Choke Flanges**: Rau cov kev siv uas tsis xau, muaj zog heev.
- **Cov Flanges Npog**: Yooj yim dua, siv rau kev kaw lub tshuab nqus tsev.

3. **Cov Zaus Bands**:
Txhua lub waveguide txhawb nqa ib qho zaus tshwj xeeb raws li nws qhov ntev.

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### **Rooj Sib Piv Waveguide-rau-Flange**
| **Waveguide** | **Qhov Zaus Ntau** | **Hom Flange** | **Qhov Loj Flange (Ib Txwm Muaj)** | **Cov Ntawv Thov** |
|----------------|--------------------------|-----------------------|-----------------------------------|------------------------------------|
| **WR-90** | 8.2–12.4 GHz (X-band) | UG-387/UPC (MIL) | Lub voj voog ntsia hlau: 1.872" (47.5 mm) | Radar, satellite comms. |
| **WR-112** | 7.05–10 GHz (C-band) | UG-595/UPC | Lub voj voog Bolt: 2.400" (61.0 mm) | Radar, telecom |
| **WR-62** | 12.4–18 GHz (Ku-band) | UG-385/UPC | Lub Voj Voog Bolt: 1.250" (31.75 mm) | Lub Tshuab Satellite, cov tub rog |
| **WR-42** | 18–26.5 GHz (K-band) | UG-383/UPC | Lub Voj Voog Bolt: 0.800" (20.3 mm) | Radar Zaus Siab |
| **WR-28** | 26.5–40 GHz (Ka-band) | UG-599/UPC | Lub Voj Voog Bolt: 0.600" (15.2 mm) | 5G, radar tsheb |
| **WR-15** | 50–75 GHz (V-band) | UG-387Mini/UPC | Lub Voj Voog Bolt: 0.400" (10.2 mm) | mmWave, kev tshawb fawb |

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### **Qhov Loj ntawm Flange (Ib txwm muaj)**
1. **Txoj Kab Uas Siv Tau Rau Lub Voj Voog (BCD)**: Txoj kab uas siv tau rau lub voj voog uas tsim los ntawm cov chaw nruab nrab ntawm cov ntsia hlau uas tau teeb tsa.
2. **Qhov Sib Nrug**: Qhov nrug ntawm cov qhov ntsia hlau (piv txwv li, 4-qhov lossis 8-qhov qauv).
3. **Qhov Qhov Rau Waveguide**: Sib phim qhov loj sab hauv ntawm waveguide.

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### **Kev Sib Raug Zoo Tseem Ceeb**
1. **Qhov Loj ntawm Waveguide ↔ Qhov Loj ntawm Flange**:
- Cov waveguides loj dua (qee zaus qis dua) siv cov flanges loj dua (piv txwv li, WR-112 flange > WR-90 flange).
- Cov waveguides me dua (zaus siab dua) siv cov flanges me me (piv txwv li, WR-28, WR-15).

2. **Kev Sib Txuas Lus ntawm Flange**:
- Cov flanges yuav tsum phim **mechanically** (qhov sib dhos, BCD) thiab **electrically** (impedance continuity).
- Kev sib xyaw cov hom flange (piv txwv li, UG-387 nrog CPR-137) xav tau cov adapters.

3. **Cov Qauv Los Ntawm Cheeb Tsam**:
- **MIL-STD (UG/UPC)**: Feem ntau nyob rau hauv Tebchaws Meskas cov kab ke tiv thaiv.
- **IEC/CPR**: Feem ntau nyob rau hauv cov txheej txheem lag luam hauv Tebchaws Europe.

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### **Piv txwv cov qauv Flange**
| **Hom Flange** | **Kev Sib Xws ntawm Waveguide** | **Cov Nta Tseem Ceeb** |
|-----------------|------------------------------------|-------------------------------------------------|
| **UG-387/UPC** | WR-90, WR-62, WR-42 | 4-qhov, MIL-STD-392, siv dav.
| **UG-599/UPC** | WR-28, WR-15 | Me me, rau cov kab ke mmWave.
| **CPR-137** | WR-112, WR-90 | Tus qauv European, tus qauv 8-qhov.
| **Choke Flange** | Txhua yam | Tsim kom muaj qhov sib txuas kom txo tau qhov xau.

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### **Cov Lus Cim**
- Ib txwm xyuas kom meej **cov duab kos tshuab** los ntawm cov chaw tsim khoom kom paub meej qhov loj me.
- Cov flanges tsis sib xws ua rau **impedance discontinuities**, ua rau VSWR puas tsuaj.
- Rau cov tshuab nqus tsev, siv **O-ring kaw cov flanges**.

Qhia rau kuv paub yog tias koj xav tau kev sib xyaw ua ke ntawm waveguide-flange!