coax(1)

💖 coax — bestie, let's measure some impedance 💖

okay so this is coax(1), from the General Commands Manual, and it's literally the cutest little tool for figuring out the impedance of a coaxial structure. the inner conductor can be offset from the centre if you need it to be, and she handles that with zero drama. 💅

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✨ NAME ✨

coax — determine impedance of a coaxial structure, where the inner may be offset from the centre if necessary.

no cap, that's the whole vibe.

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🌸 SYNOPSIS 🌸

coax [-O offset] d D Er

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🦋 DESCRIPTION 🦋

so here's the tea, bestie. coax computes the impedance of a coaxial cable. to do that it needs three things from you:

• the outside diameter of the inner conductor, d
• the internal diameter of the outer conductor, D
• the relative permittivity of the dielectric, Er

and if there's an offset between the inner and the outer — like, the coax is eccentric, which is a whole mood — you can hand that offset over as an option. 🫶

then she whips out this equation:

Zo=59.95849160 ln(x+sqrt(x^2-1)) /sqrt(Er)  Ohms

where

x=(d^2+D^2-4 O^2)/(2*D*d)

and boom, impedance. ✨ iconic math behaviour, honestly.

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🎀 FILES 🎀

coax does not read/write any files. not one. she's low maintenance like that. 💜

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👑 SEE ALSO 👑

the whole friend group, fr fr:

• atlc(1)
• create_bmp_for_circ_in_circ(1)
• create_bmp_for_circ_in_rect(1)
• create_bmp_for_microstrip_coupler(1)
• create_bmp_for_rect_cen_in_rect(1)
• create_bmp_for_rect_cen_in_rect_coupler(1)
• create_bmp_for_rect_in_circ(1)
• create_bmp_for_rect_in_rect(1)
• create_bmp_for_stripline_coupler(1)
• create_bmp_for_symmetrical_stripline(1)
• design_coupler(1)
• dualcoax(1)
• find_optimal_dimensions_for_microstrip_coupler(1)
• readbin(1)

and the links, because we stay connected:

• http://atlc.sourceforge.net — Home page
• http://sourceforge.net/projects/atlc — Download area
• /usr/local/share/atlc/docs/html-docs/index.html — HTML docs
• /usr/local/share/atlc/docs/qex-december-1996/atlc.pdf — theory paper
• /usr/local/share/atlc/examples — examples

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main character energy only, bestie 🌈 go read the theory paper if you want the why behind the equation, iykyk. 📄

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written by Dr. David Kirkby, and this whole page is serving atlc-4.6.0, dated 28th Oct 2003. mwah, periodt. 💖✨