Attenuator Cascaded Connection Planned maintenance scheduled April 17/18, 2019 at 00:00UTC (8:00pm US/Eastern) Announcing the arrival of Valued Associate #679: Cesar Manara Unicorn Meta Zoo #1: Why another podcast?
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Attenuator Cascaded Connection
Planned maintenance scheduled April 17/18, 2019 at 00:00UTC (8:00pm US/Eastern)
Announcing the arrival of Valued Associate #679: Cesar Manara
Unicorn Meta Zoo #1: Why another podcast?
$begingroup$
PAT1220-C-10DB-T5 is a 10dB attenuator. (This chip is just an example, it could be any other component as well).
Can I simply connect 3 of them in series in a PCB design to make my cheap 30dB attenuator?
I have a few attenuator modules with an SMA connector. One of them is 20dB while others are 6dB and 10dB. Can I again connect them in series to get higher attenuation?
rf-power electronics
edited Apr 9 at 16:08
Mike Waters♦
3,8772635
asked Apr 9 at 16:03
nandflash1nandflash1
252
$endgroup$
add a comment |
$begingroup$
PAT1220-C-10DB-T5 is a 10dB attenuator. (This chip is just an example, it could be any other component as well).
Can I simply connect 3 of them in series in a PCB design to make my cheap 30dB attenuator?
I have a few attenuator modules with an SMA connector. One of them is 20dB while others are 6dB and 10dB. Can I again connect them in series to get higher attenuation?
rf-power electronics
edited Apr 9 at 16:08
Mike Waters♦
3,8772635
asked Apr 9 at 16:03
nandflash1nandflash1
252
$endgroup$
1
$begingroup$
Be aware that as you get to >> 40 dB attention, leakage around the components will start to exceed the attenuated signal. You start to need to put each stage in a separate shielded can or cavity.
$endgroup$
– tomnexus
Apr 9 at 17:39
$begingroup$
Thank you. How can i shield in such case.
$endgroup$
– nandflash1
Apr 9 at 18:37
1
$begingroup$
@nandflash1 Please ask about the shielding in a new question on electronicsSE, including an image of the PCB. Not only is printed circuit board design off-topic for this site, but you are likely to get a better answer there. :-)
$endgroup$
– Mike Waters♦
Apr 9 at 20:31
add a comment |
$begingroup$
PAT1220-C-10DB-T5 is a 10dB attenuator. (This chip is just an example, it could be any other component as well).
Can I simply connect 3 of them in series in a PCB design to make my cheap 30dB attenuator?
I have a few attenuator modules with an SMA connector. One of them is 20dB while others are 6dB and 10dB. Can I again connect them in series to get higher attenuation?
rf-power electronics
edited Apr 9 at 16:08
Mike Waters♦
3,8772635
asked Apr 9 at 16:03
nandflash1nandflash1
252
$endgroup$
PAT1220-C-10DB-T5 is a 10dB attenuator. (This chip is just an example, it could be any other component as well).
Can I simply connect 3 of them in series in a PCB design to make my cheap 30dB attenuator?
I have a few attenuator modules with an SMA connector. One of them is 20dB while others are 6dB and 10dB. Can I again connect them in series to get higher attenuation?
rf-power electronics
rf-power electronics
edited Apr 9 at 16:08
Mike Waters♦
3,8772635
asked Apr 9 at 16:03
nandflash1nandflash1
252
edited Apr 9 at 16:08
Mike Waters♦
3,8772635
asked Apr 9 at 16:03
nandflash1nandflash1
252
edited Apr 9 at 16:08
Mike Waters♦
3,8772635
edited Apr 9 at 16:08
Mike Waters♦
3,8772635
edited Apr 9 at 16:08
Mike Waters♦
3,8772635
3,8772635
asked Apr 9 at 16:03
nandflash1nandflash1
252
asked Apr 9 at 16:03
nandflash1nandflash1
252
asked Apr 9 at 16:03
nandflash1nandflash1
252
252
1
$begingroup$
Be aware that as you get to >> 40 dB attention, leakage around the components will start to exceed the attenuated signal. You start to need to put each stage in a separate shielded can or cavity.
$endgroup$
– tomnexus
Apr 9 at 17:39
$begingroup$
Thank you. How can i shield in such case.
$endgroup$
– nandflash1
Apr 9 at 18:37
1
$begingroup$
@nandflash1 Please ask about the shielding in a new question on electronicsSE, including an image of the PCB. Not only is printed circuit board design off-topic for this site, but you are likely to get a better answer there. :-)
$endgroup$
– Mike Waters♦
Apr 9 at 20:31
add a comment |
1
$begingroup$
Be aware that as you get to >> 40 dB attention, leakage around the components will start to exceed the attenuated signal. You start to need to put each stage in a separate shielded can or cavity.
$endgroup$
– tomnexus
Apr 9 at 17:39
$begingroup$
Thank you. How can i shield in such case.
$endgroup$
– nandflash1
Apr 9 at 18:37
1
$begingroup$
@nandflash1 Please ask about the shielding in a new question on electronicsSE, including an image of the PCB. Not only is printed circuit board design off-topic for this site, but you are likely to get a better answer there. :-)
$endgroup$
– Mike Waters♦
Apr 9 at 20:31
1
1
$begingroup$
Be aware that as you get to >> 40 dB attention, leakage around the components will start to exceed the attenuated signal. You start to need to put each stage in a separate shielded can or cavity.
$endgroup$
– tomnexus
Apr 9 at 17:39
$begingroup$
Be aware that as you get to >> 40 dB attention, leakage around the components will start to exceed the attenuated signal. You start to need to put each stage in a separate shielded can or cavity.
$endgroup$
– tomnexus
Apr 9 at 17:39
$begingroup$
Thank you. How can i shield in such case.
$endgroup$
– nandflash1
Apr 9 at 18:37
$begingroup$
Thank you. How can i shield in such case.
$endgroup$
– nandflash1
Apr 9 at 18:37
1
1
$begingroup$
@nandflash1 Please ask about the shielding in a new question on electronicsSE, including an image of the PCB. Not only is printed circuit board design off-topic for this site, but you are likely to get a better answer there. :-)
$endgroup$
– Mike Waters♦
Apr 9 at 20:31
$begingroup$
@nandflash1 Please ask about the shielding in a new question on electronicsSE, including an image of the PCB. Not only is printed circuit board design off-topic for this site, but you are likely to get a better answer there. :-)
$endgroup$
– Mike Waters♦
Apr 9 at 20:31
add a comment |
1 Answer
1
active
oldest
votes
$begingroup$
Yes, you can cascade attenuators to realize more attenuation. Attenuation (in dB) will increase algebraically, as long as all individual attenuators are designed to operate at the same impedance and they are operating at that impedance. For example, mixing 75$Omega$ and 50$Omega$ attenuators may produce unexpected results. Same for using terminators in a system that doesn't terminate in the appropriate characteristic impedance.
Depending on what you're doing, be aware of the amount of power that each attenuator can dissipate. Putting 1W into a 30dB attenuator means only 1mW comes out - the attenuator has to dissipate the rest!
answered Apr 9 at 17:00
Brian K1LIBrian K1LI
1,891215
$endgroup$
$begingroup$
Thank you. I am aware of the power rating of components.
$endgroup$
– nandflash1
Apr 9 at 17:16
add a comment |
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1 Answer
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active
oldest
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1 Answer
1
active
oldest
votes
active
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votes
$begingroup$
Yes, you can cascade attenuators to realize more attenuation. Attenuation (in dB) will increase algebraically, as long as all individual attenuators are designed to operate at the same impedance and they are operating at that impedance. For example, mixing 75$Omega$ and 50$Omega$ attenuators may produce unexpected results. Same for using terminators in a system that doesn't terminate in the appropriate characteristic impedance.
Depending on what you're doing, be aware of the amount of power that each attenuator can dissipate. Putting 1W into a 30dB attenuator means only 1mW comes out - the attenuator has to dissipate the rest!
answered Apr 9 at 17:00
Brian K1LIBrian K1LI
1,891215
$endgroup$
$begingroup$
Thank you. I am aware of the power rating of components.
$endgroup$
– nandflash1
Apr 9 at 17:16
add a comment |
$begingroup$
Yes, you can cascade attenuators to realize more attenuation. Attenuation (in dB) will increase algebraically, as long as all individual attenuators are designed to operate at the same impedance and they are operating at that impedance. For example, mixing 75$Omega$ and 50$Omega$ attenuators may produce unexpected results. Same for using terminators in a system that doesn't terminate in the appropriate characteristic impedance.
Depending on what you're doing, be aware of the amount of power that each attenuator can dissipate. Putting 1W into a 30dB attenuator means only 1mW comes out - the attenuator has to dissipate the rest!
answered Apr 9 at 17:00
Brian K1LIBrian K1LI
1,891215
$endgroup$
$begingroup$
Thank you. I am aware of the power rating of components.
$endgroup$
– nandflash1
Apr 9 at 17:16
add a comment |
$begingroup$
Yes, you can cascade attenuators to realize more attenuation. Attenuation (in dB) will increase algebraically, as long as all individual attenuators are designed to operate at the same impedance and they are operating at that impedance. For example, mixing 75$Omega$ and 50$Omega$ attenuators may produce unexpected results. Same for using terminators in a system that doesn't terminate in the appropriate characteristic impedance.
Depending on what you're doing, be aware of the amount of power that each attenuator can dissipate. Putting 1W into a 30dB attenuator means only 1mW comes out - the attenuator has to dissipate the rest!
answered Apr 9 at 17:00
Brian K1LIBrian K1LI
1,891215
$endgroup$
Yes, you can cascade attenuators to realize more attenuation. Attenuation (in dB) will increase algebraically, as long as all individual attenuators are designed to operate at the same impedance and they are operating at that impedance. For example, mixing 75$Omega$ and 50$Omega$ attenuators may produce unexpected results. Same for using terminators in a system that doesn't terminate in the appropriate characteristic impedance.
Depending on what you're doing, be aware of the amount of power that each attenuator can dissipate. Putting 1W into a 30dB attenuator means only 1mW comes out - the attenuator has to dissipate the rest!
answered Apr 9 at 17:00
Brian K1LIBrian K1LI
1,891215
answered Apr 9 at 17:00
Brian K1LIBrian K1LI
1,891215
answered Apr 9 at 17:00
Brian K1LIBrian K1LI
1,891215
answered Apr 9 at 17:00
Brian K1LIBrian K1LI
1,891215
1,891215
$begingroup$
Thank you. I am aware of the power rating of components.
$endgroup$
– nandflash1
Apr 9 at 17:16
add a comment |
$begingroup$
Thank you. I am aware of the power rating of components.
$endgroup$
– nandflash1
Apr 9 at 17:16
$begingroup$
Thank you. I am aware of the power rating of components.
$endgroup$
– nandflash1
Apr 9 at 17:16
$begingroup$
Thank you. I am aware of the power rating of components.
$endgroup$
– nandflash1
Apr 9 at 17:16
add a comment |
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$begingroup$
Be aware that as you get to >> 40 dB attention, leakage around the components will start to exceed the attenuated signal. You start to need to put each stage in a separate shielded can or cavity.
$endgroup$
– tomnexus
Apr 9 at 17:39
$begingroup$
Thank you. How can i shield in such case.
$endgroup$
– nandflash1
Apr 9 at 18:37
1
$begingroup$
@nandflash1 Please ask about the shielding in a new question on electronicsSE, including an image of the PCB. Not only is printed circuit board design off-topic for this site, but you are likely to get a better answer there. :-)
$endgroup$
– Mike Waters♦
Apr 9 at 20:31