scholarly journals Microwave Transmittance Technique Using Microstrip Patch Antennas, as a Non-Invasive Tool to Determine Soil Moisture in Rhizoboxes

Sensors ◽  
2020 ◽  
Vol 20 (4) ◽  
pp. 1166
Author(s):  
Paulo Sergio de Paula Herrmann ◽  
Viktor Sydoruk ◽  
Felipe Nieves Marques Porto
Keyword(s):  
Soil Moisture ◽  
Plant Root ◽  
Microwave Frequency ◽  
Patch Antennas ◽  
System Sensitivity ◽  
Non Invasive ◽  
Microstrip Patch Antennas ◽  
Microstrip Patch ◽  
Quantitative Results ◽  
Plant Root Systems

Investigating the growth behavior of plant root systems as a function of soil water is considered an important information for the study of root physiology. A non-invasive tool based on electromagnetic wave transmittance in the microwave frequency range, operating close to 4.8 GHz, was developed using microstrip patch antennas to determine the volumetric moisture of soil in rhizoboxes. Antennas were placed on both sides of the rhizobox and, using a vector network analyzer, measured the S parameters. The dispersion parameter S21 (dB) was also used to show the effect of different soil types and temperature on the measurement. In addition, system sensitivity, reproducibility and repeatability were evaluated. The quantitative results of the soil moisture, measured in rhizoboxes, presented in this paper, demonstrate that the microwave technique using microstrip patch antennas is a reliable, non-invasive and accurate system, and has shown potentially promising applications for measurement of rhizobox-based root phenotyping.

scholarly journals Scattering Parameters Measurements with the Microwave Transmittance Technique Using a Microstrip Patch Antennas, as Non-Invasive Tool for Determination of Soil Moisture

2019 ◽  
Author(s):  
Paulo Sergio de Paula Herrmann ◽  
Felipe Nieves Marques Porto ◽  
Viktor Sydoruk
Keyword(s):  
Soil Moisture ◽  
Electromagnetic Waves ◽  
Plant Root ◽  
Effect Of Temperature ◽  
Patch Antennas ◽  
Non Invasive ◽  
Microstrip Patch Antennas ◽  
Microstrip Patch ◽  
5 Ghz

Interactions of soil moisture with plant root systems are very important for plant growth. For non-invasive determination of volumetric soil moisture in a rhizobox, a microwave system based on transmittance of electromagnetic waves in the microwave frequency range was developed using microstrip patch antennas. Vector Network Analyzers (VNAs) were used to measure the S-parameters at frequency ranges close to 5 GHz. A transmission system with microstrip patch antennas was developed. The result of this attenuation is in the frequency domain. The antennae were designed as resonant microstrip antennae. The antennae were placed on both sides of a rhizobox, which allowed non-invasive measuring soil moisture in the box. The attenuation (S21(dB)) was used to measure the effect of temperature, and different types of soil; as well as sensitivity, reproducibility and repeatability of the system. In this work we present quantitative results of soil moisture in rhizobox. The microwave technique, using microstrip patch antennas, is a reliable and accurate system, and showed very promising potential applications for rhizobox-based investigations of root performance.

scholarly journals A Theoretical Survey on Patch Antenna for Wideband Communication

2020 ◽  
Vol 3 (11) ◽  
pp. 69-73
Author(s):  
Kali Krishna Giri ◽  
Raj Kumar Singh ◽  
Kumari Mamata ◽  
Ajeet Kumar Shrivastava
Keyword(s):  
Communication System ◽  
Patch Antenna ◽  
Low Cost ◽  
Microwave Frequency ◽  
Microstrip Patch Antenna ◽  
Patch Antennas ◽  
Microstrip Patch Antennas ◽  
Microstrip Patch ◽  
Wide Range ◽  
Low Efficiency

Modern communication system is based on wideband communication. A wideband antenna is designed in such a way that it will receive a wide range of frequencies. Microwave frequency spectrum is classified as ranging from 1GHz to 100GHz and this range is divided into a number of frequency bands. These bands are defined as L Band, S Band, C Band, X Band etc. To fulfil the demands of many users patch antenna is designed in these bands. Among different types of antenna, Microstrip Patch Antenna is most popular in wireless communication system. Microstrip patch Antennas have many advantages over other familiar antennas because microstrip patch antennas are of low profile, low cost, low volume, light weight. Low efficiency, low gain and narrow bandwidth of patch antenna create major challenge to a designer. Slots are created on patch for preparing antenna forwideband applications. In this paper, we have surveyed upon various types of Microstrip Patch Antenna, feeding techniques, design equation Substrate Characteristics, Simulation tools etc.

Bio-Inspired Algorithms Applied on Microstrip Patch Antennas: a Review

2016 ◽  
Vol 6 (6) ◽  
pp. 336
Author(s):  
Omar A. Saraereh ◽  
Amer A. Al Saraira ◽  
Qais H. Alsafasfeh ◽  
Aodeh Arfoa
Keyword(s):  
Patch Antennas ◽  
Microstrip Patch Antennas ◽  
Microstrip Patch

An improved design of harmonic suppression for microstrip patch antennas

2006 ◽  
Vol 49 (1) ◽  
pp. 103-105 ◽  
Author(s):  
M. K. Mandal ◽  
P. Mondal ◽  
S. Sanyal ◽  
A. Chakrabarty
Keyword(s):  
Patch Antennas ◽  
Harmonic Suppression ◽  
Microstrip Patch Antennas ◽  
Microstrip Patch ◽  
Improved Design
Sign in / Sign up

Export Citation Format

Share Document