Contents
How do you calculate feed line?
- Feed Section Operating Line (q-line)
- See the Figure below for a feed tray and consider F moles/hr of feed, with fraction q of liquid; thus.
- liquid flow = q F moles/hr.
- Overall material balance:
- Component balance for the more volatile component – see the Figure below:
- Rectifying section : V y = L x + D xD.
What is Q feed line?
The parameter q is the mole fraction of liquid in the feed and the slope of the q-line is q / (q – 1). For example, if the feed is a saturated liquid it has no vapor, thus q = 1 and the slope of the q-line is infinite which means the line is vertical. Some example q-line slopes are presented in Figure 2.
What is line antenna?
In a radio antenna, the feed line (feedline), or feeder, is the cable or other transmission line that connects the antenna with the radio transmitter or receiver. In a transmitting antenna, it feeds the radio frequency (RF) current from the transmitter to the antenna, where it is radiated as radio waves.
How do you find the radius of a circular patch antenna?
Take the square root of (W+Dh) x (H+Dh), then divide that subtotal by two. Now you have your radius in millimeters for a circular patch antenna driven by a Quad Hybrid for the same freq as the rectangle patch antenna.
What is meant by circular patch antenna?
The circular patch antenna is designed on a FR4 substrate with di- electric constant εr = 4.4 and height of the substrate is 1.6mm. Several antenna characteristics such as return loss, radiation pattern, percentage bandwidth, directivity, antenna gain, radiation efficiency etc.
How is the length of a patch antenna calculated?
The patch antenna calculator calculates length and width as outputs and requires inputs such as RF center frequency, dielectric constant and height of substrate. Following equations or formula are used for this microstrip patch antenna calculator.
Is there an antenna calculator for a ham radio?
Here is a simple antenna calculator for two popular forms of ham radio HF wire antennas: the horizontal dipole and the inverted “V”. (Updated June 5, 2021)
How to calculate the length of a dipole antenna?
The Half-Wave Dipole Antenna. The most widely used formula to calculate the approximate overall length of wire required for a dipole is: 468 / frequency (MHz) = length of wire in feet. The antenna calculator above uses this formula as a starting point to calculate wire lengths for the dipole.
How to calculate the center frequency of an antenna?
All you need to do is enter the desired resonant (center) frequency in the form below, then click “Calculate”. The correct lengths for the various models will be displayed in the chart. (To better understand the variables be sure to read the application notes and study the drawings, following.)