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Planar Yagi-Uda Antenna Element Dimensions & Front-to-Back (F/B) Ratio Calculator

Easily calculate and compute planar yagi-uda antenna element dimensions & front-to-back (f/b) ratio calculator with accurate equations, live formulas, and expert guidance.

Operating center frequency (e.g. 435 MHz for 70cm amateur band).

Number of directors in front of driven element (1 to 15).

Boom / element rod physical diameter.

Calculated Result
13 dBi

Forward Gain

Forward Gain

13 dBi

Estimated Forward Gain Dbi

13

Front To Back Ratio Db

18.7

Reflector Element Length Mm

341.1

Driven Element Length Mm

327.4

13 — dBi

Calculation Breakdown

  1. Applied FormulaSizes parasitic director and reflector element lengths, inter-element boom spacings, forward gain, and front-to-back (F/B) isolation ratios for directional Yagi-Uda antennas.L_{ref} > L_{driven} > L_{dir}, \quad G_{dBi} \approx 7.2 + 1.15 N_d

Yagi-Uda Antenna Design Metric Output

Interactive visualization based on your current inputs

Calculated Value
0.03.36.59.813Forward Gain

What Is the Planar Yagi-Uda Antenna Element Dimensions & Front-to-Back (F/B) Ratio Calculator?

This tool computes planar yagi-uda antenna element dimensions & front-to-back (f/b) ratio calculator with high precision arithmetic.

How Does the Planar Yagi-Uda Antenna Element Dimensions & Front-to-Back (F/B) Ratio Calculator Work?

Sizes parasitic director and reflector element lengths, inter-element boom spacings, forward gain, and front-to-back (F/B) isolation ratios for directional Yagi-Uda antennas.

Planar Yagi-Uda Antenna Element Dimensions & Front-to-Back (F/B) Ratio Calculator Formula & Variables

The core mathematical equation utilized by this calculator is expressed as:

Lref>Ldriven>Ldir,GdBi≈7.2+1.15NdL_{ref} > L_{driven} > L_{dir}, \quad G_{dBi} \approx 7.2 + 1.15 N_d

Sizes parasitic director and reflector element lengths, inter-element boom spacings, forward gain, and front-to-back (F/B) isolation ratios for directional Yagi-Uda antennas.

How to Use the Planar Yagi-Uda Antenna Element Dimensions & Front-to-Back (F/B) Ratio Calculator

  1. Enter your parameters into the designated input fields to calculate the result immediately.

Step-by-Step Example Calculation

Planar Yagi-Uda Antenna Element Dimensions & Front-to-Back (F/B) Ratio Calculator Example

Input Values:

centerFrequencyMhz:435
numberOfDirectorsN:5
elementDiameterMm:6
Worked Steps: Sample evaluation based on standard reference conditions.

Understanding Your Result

The calculated primary figure indicates the optimal or required dBi.

Factors That Affect the Result

  • Measurement tolerances, operational variance, and real-world conditions.

When Should You Use This Calculator?

  • Everyday budgeting, technical homework, professional estimation, and household projects.

Assumptions & Limitations

  • Assumes standard atmospheric or environmental parameters unless specified.

Frequently Asked Questions

Calculation Accuracy & Reference Note

Double-precision IEEE 754 arithmetic with validated empirical constants.

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