VWSWR, rov qab poob (RL), muaj hwj huam txog lub zog, thiab lub zog sib kis

Kev sib txheeb ntawm cov hluav taws xob volting waim ratio (VWSWR), rov qab poob (RL), siv zog los ntawm lub zog loj los ntawm kev xav txog kev hloov pauv (γ). Hauv qab no yog cov qauv tseem ceeb thiab cov kauj ruam rau kev hloov dua siab tshiab:

### ** Cov Qauv Qauv **
1. ** Kev xav paub cov coeffeefficient (γ) **:

\ Gamma = \ frac {vswr} - 1} {\ ntawv {VWSWR {VWSWR} + 1}

2. ** VWSWR ** LOS NTAWM γ:

\ ntawv {vswr} = \ fac {1 + | \ gamma |} {1 - | \ gamma |}

3. ** Rov qab poob (RL) ** Hauv DB:

\ ntawv {rl (db)} = -20 \ log_ {10} (| \ gamma |)

4. ** Xav txog lub hwj chim (%) ** **:

P _ {\ ntawv nyeem {wb}} = | \ gamma | ^ 2 \ sij hawm 100 yog muaj sijhawm 100

5. ** Lub zog sib kis (%) ** **:

P _ {\ ntawv nyeem {trans}} = \ sab laug (1 - | \ gamma | ^ \ txoj cai 100 yog muaj%

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### ** Cov kauj ruam hloov dua siab tshiab **
#### ** 1. Pib nrog VWWRR **:
- Xam γ:

\ Gamma = \ frac {vswr} - 1} {\ ntawv {VWSWR {VWSWR} + 1}

- Siv γ txhawm rau nrhiav RL, cuam tshuam rau lub hwj chim, thiab siv zog siv cov qauv saum toj no.

#### ** 2. Pib poob rov qab (RL hauv DB) **:
- Xam γ:

| \ Gamma | = 10 ^ {- \ ntawv {rl} / 20}

- Siv γ nrhiav cov VWSWR, cuam tshuam lub hwj chim, thiab lub zog sib kis.

#### ** 3. Pib nrog rov qab / kis lub zog loj **:
- Rau ** muaj hwj chim rau ** (\ (p _ {\ ntawv}} \):

| \ Gamma | = \ sqrt {\ frc {p _ {\ ntawv}}} {100} {100}}

- Rau ** rau lub zog sib kis ** (\ (p _ {\ ntawv {trans}} \)):

| \ Gamma | = \ sqrt {1 - \ frac {p _ {\ ntawv nyeem {trans}} {100} {100} {100} {100} {100}}

- Siv γ los laij vswr thiab rl.

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### *** Piv txwv lub rooj **
| ** VWSWR ** | ** rov qab poob (DB) ** | ** Pom cov hwj chim (%) ** | ** Muab lub zog sib kis (%) ** |
| ---------------------- | ----------------------------------------------- |
| 1.0 | ∞ (phim phim) | 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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### ** Cov Ntawv Tseem Ceeb **
- A ** VWSWR ntawm 1: 1 ** txhais tau tias tsis muaj kev cuam tshuam (γ = 0, RL = ∞).
- ** Dua cov vwstr ** lossis ** qis RL ** qhia tias muaj kev cuam tshuam ntau dua.
- ** ** Lub hwj chim kis tau ** yog qhov ua kom tiav thaum VWSWR ≈ 1.

Siv cov qauv no los sib txuas ntawm cov tsis muaj tseeb rau kev yuam kev hauv RF systems.