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水中平面探头的近场距离

水中平面探头的近场距离

频率

晶片直径

近场距离

焦距(PTF)**

最小值

最大值

(MHz)

(英寸)

(英寸)

(英寸)

(英寸)

0.5

1.50

4.757

2.15

3.80

1.125

2.661

1.50

2.10

1.00

2.095

1.25

1.65

0.75

1.164

0.78

0.93

1.0

1.50

9.559

2.50

7.65

1.125

5.366

1.90

4.30

1.00

4.235

1.625

3.38

0.75

2.372

1.00

1.90

0.50

1.043

0.60

0.80

2.25

1.50

21.534

2.70

14.50

1.125

12.099

2.15

9.50

1.00

9.554

1.875

7.60

0.75

5.364

1.00

4.30

0.50

2.374

0.80

1.90

0.375

1.329

0.50

1.06

0.25

0.584

0.35

0.45

3.5

1.00

14.868

1.95

11.5

0.75

8.350

1.00

6.65

0.50

3.699

0.83

2.95

0.375

2.073

0.60

1.65

0.25

0.914

0.385

0.70

5.0

1.00

21.243

1.95

14.40‡

0.75

11.932

1.00

9.50

0.50

5.287

0.75

4.20

0.375

2.965

0.60

2.35

0.25

1.309

0.43

1.00

7.5

0.75

17.900

1.00

12.75‡

0.50

7.933

0.75

6.30‡

10

1.00

42.490

2.00

20.00‡

0.75

23.868

1.00

15.375‡

0.50

10.579

0.75

8.40‡

0.375

5.934

0.60

4.75‡

0.25

2.622

0.46

2.10

15

0.50

15.870

0.75

11.75‡

0.375

8.902

0.60

7.10‡

0.25

3.935

0.50

3.15‡

20

0.25

5.247

0.50

4.20‡

0.125

1.290

0.25

1.00‡

25

0.25

6.559

0.50

5.25‡

频率

焦距

MHz 英寸
5.0 13
7.5 6
10 3.5
15 1.5
20 0.8
25 0.5
30 0.4
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