---
name: "coax"
section: "1"
platform: "linux"
package: "atlc"
version: "4.6.1-6"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/coax"
---

# coax(1)

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

## NAME

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

## SYNOPSIS

**coax \[-O offset\] d D Er**\

## DESCRIPTION

coax computes the impedance of a coaxial cable, given the  outside diameter of the inner conductor d, the internal diameter of the outer  conductor D and the relative permittivity of the dielectric Er. If there is  an offset between the inner and outer (i.e. the coax is eccentric),  the offset can be given as a option. coax uses the  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) \
\

## FILES

coax does not read/write any files.

## SEE ALSO

[atlc(1)](/atlc/1.md)\
 [create\_bmp\_for\_circ\_in\_circ(1)](/create_bmp_for_circ_in_circ/1.md)\
 [create\_bmp\_for\_circ\_in\_rect(1)](/create_bmp_for_circ_in_rect/1.md)\
 [create\_bmp\_for\_microstrip\_coupler(1)](/create_bmp_for_microstrip_coupler/1.md)\
 [create\_bmp\_for\_rect\_cen\_in\_rect(1)](/create_bmp_for_rect_cen_in_rect/1.md)\
 [create\_bmp\_for\_rect\_cen\_in\_rect\_coupler(1)](/create_bmp_for_rect_cen_in_rect_coupler/1.md)\
 [create\_bmp\_for\_rect\_in\_circ(1)](/create_bmp_for_rect_in_circ/1.md)\
 [create\_bmp\_for\_rect\_in\_rect(1)](/create_bmp_for_rect_in_rect/1.md)\
 [create\_bmp\_for\_stripline\_coupler(1)](/create_bmp_for_stripline_coupler/1.md)\
 [create\_bmp\_for\_symmetrical\_stripline(1)](/create_bmp_for_symmetrical_stripline/1.md)\
 [design\_coupler(1)](/design_coupler/1.md)\
 [dualcoax(1)](/dualcoax/1.md)\
 [find\_optimal\_dimensions\_for\_microstrip\_coupler(1)](/find_optimal_dimensions_for_microstrip_coupler/1.md)\
 [readbin(1)](/readbin/1.md)

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\