---
name: "yagi"
section: "1"
platform: "linux"
package: "yagiuda"
version: "1.19-12"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/yagi"
---

# yagi(1)

Yagi-Uda project antenna current calculator

## NAME

yagi - Yagi-Uda project antenna current calculator

## SYNOPSIS

**yagi** \[ **- dhps** \] filename

## DESCRIPTION

The program  *yagi* is one of a number of executable programs that forms part of a set of  programs, collectively known as the *Yagi-Uda project* , which were designed for analysis and optimisation of Yagi-Uda antennas.  *yagi* calculates the currents at the centre of each element at one or more frequencies, as specified in the input file.

## AVAILABILITY

## OPTIONS

- **-d**

  Display element currents. When this option is used, a bar graph with up to 70 stars (\*) is used to display the absolute magnitude of the element currents. The element with the greatest element current has 70 \*'s, all others have a corresponding smaller number, depending on the their relative current. The element current, normallised to the maximum, is also shown as a 4 digit floating point number.

- **-h**

  Print a help message.

- **-p**

  Print the Z matrix. The Z matrix is the impedance matrix, showing the self impedance of the elements on the diagonal and the mutual impedance off the diagonal.

- **-s**

  Suppress all diagnostic output. By default, the program print the percentage of the job completed.

- *filename*

  is the name of the file containing the antenna description. It is expected to be in a format created by either *input* or *first* - two other programs in the  *Yagi-Uda project.* This is an ASCII text file. The antenna currents are written to a file *filename.out* which is a binary file. It is not intended to be read by humans.

## Limitations

I'm not aware of any limitations, apart from that filenames, including full path, can't exceed 90 characters.

## FILES

filename.out       Binary data file\

## SEE ALSO

[first(1)](/first/1.md), [input(1)](/input/1.md), [output(1)](/output/1.md), [optimise(1)](/optimise/1.md), [first(5)](/first/5.md), [input(5)](/input/5.md), [output(5)](/output/5.md) and [optimise(5)](/optimise/5.md).

## PLATFORMS

Both DOS and Unix versions have been built. The DOS version as distributed requires a 386 PC with a 387 maths coprocessor.

## BUGS

Bugs should be reported to **david.kirkby@onetel.net**. Bugs tend actually to be fixed if they can be isolated, so it is in your interest to report them in such a way that they can be easily reproduced. If the input file is edited manually and done incorrectly, there can be unpredictable results.

## AUTHORS

Dr. David Kirkby G8WRB (david.kirkby@onetel.net), with  help with converting to DOS from Dr. Joe Mack NA3T (mack@fcrfv2.ncifcrf.gov).