VSWR, fa'afo'i gau (RL), fa'aalia le mana, ma le mana fa'asalalau

O feso'ota'iga i le va o le Voltage Standing Wave Ratio (VSWR), toe fa'afo'i gau (RL), fa'aalia le malosi, ma le paoa fa'asalalau e feso'ota'i e ala i le fa'atusa o ata (Γ). O lo'o i lalo fa'asologa autu ma laasaga mo le liua:

### ** Fua Faatatau Autu**
1. **Fa'atatau Fa'atatau (Γ)**:

\Gamma = \frac{\text{VSWR} - 1}{\text{VSWR} + 1}

2. **VSWR** mai Γ:

\text{VSWR} = \frac{1 + |\Gamma|}{1 - |\Gamma|}

3. **Fa'afo'i tupe leiloa (RL)** ile dB:

\text{RL (dB)} = -20 \log_{10}(|\Gamma|)

4. **Mana Fa'aali (%)**:

P_{\text{refl}} = |\Gamma|^2 \taimi 100\%

5. ** Malosi Faaliliu (%)**:

P_{\text{trans}} = \tauagavale(1 - |\Gamma|^2\taumatau) \taimi 100\%

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### **Laasaga Liua**
#### **1. Amata ile VSWR**:
- Fa'atatau Γ:

\Gamma = \frac{\text{VSWR} - 1}{\text{VSWR} + 1}

- Fa'aaoga le Γ e su'e ai le RL, fa'aalia le malosi, ma le mana fa'asalalau e fa'aaoga ai fua fa'atatau i luga.

#### **2. Amata ile Toe Fa'afo'i (RL ile dB)**:
- Fa'atatau Γ:

|\Gamma| = 10^{-\text{RL}/20}

- Fa'aaoga le Γ e su'e ai le VSWR, fa'aalia le malosi, ma le mana fa'asalalau.

#### **3. Amata ile Mana Fa'aali/Fa'aliliu**:
- Mo **mana fa'aali**(\(P_{\text{refl}}\)):

|\Gamma| = \sqrt{\frac{P_{\text{refl}}}{100}}

- Mo **le mana fe'avea'i** (\(P_{\text{trans}}\)):

|\Gamma| = \sqrt{1 - \frac{P_{\text{trans}}}{100}}

- Fa'aaoga le Γ e fa'atatau le VSWR ma le RL.

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### ** Fa'ata'ita'iga Laulau**
| **VSWR** | **Fa'afo'i gau (dB)** | ** Mana Fa'aali (%)** | ** Malosiaga Tuuina atu (%)** |
|-----------------------|----------------------|-----------------------|-------------------------|
| 1.0 | ∞ (Atoatoa fetaui) | 0% | 100% |
| 1.5 | 14.0 dB | 4% | 96% |
| 2.0 | 9.5 dB | 11.1% | 88.9% |
| 3.0 | 6.0 dB | 25% | 75% |

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### **Faamatalaga Autu**
- O le **VSWR o le 1:1** o lona uiga e leai se ata (Γ = 0, RL = ∞).
- ** VSWR maualuga ** poʻo ** RL pito i lalo ** e faʻaalia ai le sili atu o le malosi faʻaalia.
- **O le mana faʻasalalau** e faʻateleina pe a VSWR ≈ 1.

Fa'aoga nei fua fa'atatau e fa'afeso'ota'i i le va o tapula'a mo le fa'afetauiga o le fa'alavelave i faiga RF.