# RF Wireless World

## Home of RF and Wireless Vendors and Resources

One Stop For Your RF and Wireless Need

## What is Dominant mode?

This page explains dominant mode is all about and provides useful links. Following section explains dominant mode in rectangular waveguide and circular waveguide.

### Dominant mode in Rectangular waveguide

Cutoff wavelength equation for rectangular waveguide is define below.

Here, m= number of half-wave along broad side dimension,
N= number of half-wave along the shorter side.
For dominant mode TE10, m=1, n=0 and hence, λc= 2(broad dimension) =2a

### Dominant mode in Circular waveguide

Cutoff Frequency equation for circular waveguide fc is defined below , fc= (1.8412 * c /2*pi*a) Where, c is the speed of light within waveguide and a is the radius of the circular cross section. Fc= For dominant mode TE11, λc= 1.71(diameter)=1.71d

RF Switch basics and applications along with manufacturers of RF switch refer following link:
RF Switch

For types of waveguide viz. rectangular & circular, waveguide propagation modes, impedance matching of waveguide read following waveguide tutorial.
waveguide basics tutorial

Manufacturers of waveguide components such as waveguide to coaxial adapter, coupler, flanges, gasket, tees, termination, shorts, isolator, circulator, horn antenna, attenuator, feed-thrus, bends, loads, twists, straights, pressure windows, transformers, sliding short circuits, fixed short circuits, sliding mismatches etc. visit following link.
Waveguide components manufacturer

Rectangular waveguide dimensions as per USA standard including frequency, broad dimension and narrow dimensions, visit following link.
Waveguide dimensions table