Sensitivity enhancement for moisture content detection using modified microstrip patch antennas
Source abstract
Abstract
A modified slotted microstrip patch sensor antenna has been developed for sensitivity enhancement to measure the moisture content of leaves. The design incorporates a rectangular slot positioned above the feed of a rectangular patch antenna. The antenna achieves resonant frequency at a lower range than the operating frequency of a traditional patch antenna without slot while maintaining a miniaturized form factor. To evaluate the sensitivity of the proposed modified slotted patch antenna, the variation in the resonant frequency and the reflection coefficient (S11) is observed with the sample under test (SUT), i.e., leaf is placed above the patch. A comparative analysis with regard to sensitivity and shift in frequency is performed between the designed antenna structures. The designed antenna is fabricated on a 0.8 mm F4B substrate in order to resonate within the 2.40–2.80 GHz range under unloaded conditions. The antenna’s sensitivity is tested by performing parametric analysis with respect to the permittivity of the leaf ranging from 20 to 30. The experimental results reveal that the sensitivity of the proposed patch antenna is enhanced by a factor of 1.67 as compared to traditional patch antenna for the four levels of SUT, demonstrating an enhanced sensitivity in detecting the moisture content of leaves.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Microwave and Dielectric Measurement Techniques · Antenna Design and Analysis · Microwave Engineering and Waveguides
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Electronic, Science and Engineering, University of Electronic Science and Technology (UESTC) 1 , Chengdu, People’s Republic of China
Electronics Engineering Department, Sir Syed University of Engineering and Technology (SSUET) 2 , Karachi, Pakistan
Funding
National Natural Science Foundation of China · Fundamental Research Funds for the Central Universities
References (40)
Show source-provided references
1. Utilising microstrip patch antenna strain sensors for structural health monitoring10.1177/1045389x11432655 ↗
2. Portable wireless antenna sensor for simultaneous shear and pressure monitoring
3. Antenna sensors in passive wireless sensing systems10.1007/978-981-4560-44-3_86 ↗
4. Flexible wireless antenna sensor: A review10.1109/jsen.2013.2242464 ↗
5. Frequency tunable liquid metal on paper microstrip patch antenna10.1063/5.0139901 ↗
6. Planar microwave sensors for complex permittivity characterization of materials and their applications
7. Material characterization using complementary split ring resonators
8. Metamaterial-based microfluidic sensor for dielectric characterization10.1016/j.sna.2012.10.027 ↗
9. A simple and low-cost measurement system for the complex permittivity characterization of materials10.1109/tim.2004.830753 ↗
10. Design of microstrip antennas covered with a dielectric layer10.1109/tap.1982.1142766 ↗
11. Assessment of moisture content measurement methods of dried food products in small-scale operations in developing countries: A review10.1016/j.tifs.2019.04.006 ↗
12. Application of microwave moisture sensor for DOC and animal feed10.1109/jsen.2020.3010574 ↗
13. A design method for a microwave-based moisture sensing system for granular materials in arbitrarily shaped containers10.1109/jsen.2021.3087414 ↗
14. Determining moisture content of wheat with an artificial neural network from microwave transmission measurements10.1109/19.728803 ↗
15. Measurement of grain moisture content using microwave attenuation at 10.5 GHz and moisture density10.1109/19.989904 ↗
16. Nondestructive in situ measurement method for kernel moisture content in corn ear10.3390/s16122196 ↗
17. Rapid-detection sensor for rice grain moisture based on NIR spectroscopy10.3390/app9081654 ↗
18. A novel, portable and fast moisture content measuring method for grains based on an ultra-wideband (UWB) radar module and the mode matching method10.3390/s19194224 ↗
19. A novel handheld device for intact corn ear moisture content measurement10.1109/tim.2020.2994603 ↗
20. Industrial scale electromagnetic grain bin monitoring10.1016/j.compag.2017.03.005 ↗
21. Compact frequency selective surface antenna for grain moisture content monitoring
22. Polypropylene-based dual-band CPW-fed monopole antenna [antenna applications corner]10.1109/map.2013.6586683 ↗
23. A three-port zero-power RFID sensor architecture for IoT applications10.1109/access.2020.2985711 ↗
24. A Batteryless RFID sensor architecture with distance ambiguity resolution for smart home IoT applications10.1109/jiot.2021.3095136 ↗
25. Selective real-time non-contact multi-variable water-alcohol-sugar concentration analysis during fermentation process using microwave split-ring resonator based sensor10.1016/j.sna.2021.112695 ↗
26. An unpowered sensor node for real-time water quality assessment (humic acid detection)10.3390/electronics7100231 ↗
27. Precise measurement of the dielectric constants of liquids using the principle of cross capacitance10.1109/19.918126 ↗
28. Microplastic detection in soil and water using resonance microwave spectroscopy: A feasibility study10.1109/jsen.2020.3011311 ↗
29. Determination of dielectric constant of fabric materials and their use as substrates for design and development of antennas for wearable applications10.1109/tim.2010.2063090 ↗
30. Contactless detection of moisture content in blended fabrics with a free-space microwave method10.1109/tim.2019.2924065 ↗
31. Dual-frequency microwave moisture sensor based on circular microstrip antenna10.1109/jsen.2007.908920 ↗
32. Design of microstrip moisture sensor for determination of moisture content in rice with improved mean relative error10.1002/mop.31763 ↗
33. 2021
34. Design and analysis of a microstrip patch antenna for water content sensing
35. Complementary split-ring resonator-loaded microfluidic ethanol chemical sensor10.3390/s16111802 ↗
36. A rectangular patch antenna technique for the determination of moisture content in soil
37. Intercomparison of methods for determination of resonant frequency shift of a microstrip patch antenna loaded with Hevea rubber latex10.1155/2014/656972 ↗
38. Slot-loaded microstrip patch sensor antenna for high-sensitivity permittivity characterization10.3390/electronics8050502 ↗
39. Rice grain moisture determination using microstrip wide-ring and microstrip coupled-line sensors10.3844/ajassp.2015.112.120 ↗
40. Microwave sensor for non-destructive dielectric characterization of biological systems10.3233/jae-150114 ↗