Vivaldi ant


militaryoperator
 

Is there a benefit for mounting a Vivaldi in a horn enclosure?

Is this better than having the Vivaldi in the open?

s-l1600 (2).jpg

Ben






--------------------------------------
Curator, Owner and Display coordinator
Military Wireless Museum
Kidderminster, UK.

This message was meant for the recipient
Any likeness to persons living or dead is odd
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KENT BRITAIN
 

Another example would be WG16,  suggested frequency range, 8-12 GHz.

Put a ridge down the middle, ridged waveguide, and the suggested frequency range
is now 5-12 GHz.     With the Vivaldi, how narrow you can make the slot sets the
upper frequency limit.  Width of the opening sets the lower frequency limit.
Kent

On Wednesday, July 1, 2020, 6:10:58 AM CDT, militaryoperator via groups.io <military1944@...> wrote:


Is there a benefit for mounting a Vivaldi in a horn enclosure?

Is this better than having the Vivaldi in the open?

s-l1600 (2).jpg

Ben






--------------------------------------
Curator, Owner and Display coordinator
Military Wireless Museum
Kidderminster, UK.

This message was meant for the recipient
Any likeness to persons living or dead is odd
---------------------------------------


militaryoperator
 












Hi Kent. Ok, but do you get better results, gain etc if the viv is mounted in a horn like in the picture?
as opposed to mounting the viv in open space by itself.

Ben.




Subject: Re: [UKMicrowaves] Vivaldi ant

Another example would be WG16,  suggested frequency range, 8-12 GHz.

Put a ridge down the middle, ridged waveguide, and the suggested frequency range
is now 5-12 GHz.     With the Vivaldi, how narrow you can make the slot sets the
upper frequency limit.  Width of the opening sets the lower frequency limit.
Kent

On Wednesday, July 1, 2020, 6:10:58 AM CDT, militaryoperator via groups.io <military1944@...> wrote:


Is there a benefit for mounting a Vivaldi in a horn enclosure?

Is this better than having the Vivaldi in the open?

s-l1600 (2).jpg

Ben



KENT BRITAIN
 



Think of it as another way to feed a horn.

Hard to get a Vivaldi above 8 dBi or so gain.
Ridged horns can easily go to 20 dBi.

Of course the EMI horn is playing other games to get a more
constant Antenna Factor.

The Copper ones are mine, the 'PTI' is one at the EMI
lab I use for FCC/CE certifications.



On Wednesday, July 1, 2020, 10:29:16 AM CDT, militaryoperator via groups.io <military1944@...> wrote:


militaryoperator
 

Many thanks, Kent. 

Ben.



Subject: Re: [UKMicrowaves] Vivaldi ant
Think of it as another way to feed a horn.
Hard to get a Vivaldi above 8 dBi or so gain.
Ridged horns can easily go to 20 dBi.
Of course the EMI horn is playing other games to get a more
constant Antenna Factor.
The Copper ones are mine, the 'PTI' is one at the EMI
lab I use for FCC/CE certifications.