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19 Cards in this Set
- Front
- Back
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Ohm's Law
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Volts= Resistance(Ohms) x Current(Amps)
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Other names for Freq
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Central
Operating Resnoance Natural Dominant |
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Thicker Crystal has what kind of period and frequency
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Lower Freq
Longer Period |
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Lateral Resolution is better bc
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pulses are generally wider than they are long.
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Determine element thickness
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WL= PS/F
then half WL |
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How can beams be described
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Shape
Intensity Distance Diamter |
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Determine PW Freq
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F(MHz)= c(mm/us) / 2 x T(mm)
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unit for potential difference
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volts
1V= 1J/1C |
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4 ways change focus
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curved (I)
lens electical steering(I) mirror |
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high freq beams are
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thinner
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AR=
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spl / 2
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SPL=
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wl x # cycles
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NZL(mm) =
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D2/4(WL)
D2 x F / 6 |
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F# =
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NZL/ Aperture
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MBW at Focus=
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2(WL) x F #
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More curvature(time delays and focusing)
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increase time delays
shorter NZL tighter focus |
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More time bw delays
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wider steering angle will be
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smaller time delays
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narrower steering will be
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A decrease in axial and lateral resolution is
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good
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