Simulation of Small Radio Telescope Antenna Parameters at Frequency of 1.42 GHz

Jallod, Uday E.; Mahdi, Hareth S.; Abood, Kamal M.

doi:10.30723/ijp.v20i1.726

Cited by 4 publications

(4 citation statements)

References 15 publications

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“…The LBA work in the frequency range 15-80 MHz and HBA antennas the frequency range 110-240 MHz for observed background noise include radio frequency interference (RFI) as more devices connect to the network, the radio frequency spectrum becomes so crowded that frequency bands often overlap [11]. Other wireless devices that use the same frequency as Wi-Fi can also interfere with your network connection, as can nearby debris and other types of equipment.…”

Section: Introductionmentioning

confidence: 99%

Study of Sky Radio Frequency Interference Background Level Behavior During the Partial Solar Eclips on 25 Oct. 2022 at The Baghdad University Location

Kahdim,

Abood

2024

Al-Mustansiriyah Journal of Science

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Radiofrequency interference (RFI) describes the weakening of radio astronomy transmissions caused by man-made radio signal noise in radio telescope observation indicates the level of radio frequency noise in the sky at all times, regardless of any astronomical sources. This noise is affected by various sources, including Earth's atmosphere or solar activity and all communications equipment operating near the radio telescope. In this study, the background noise which includes RFI was measured using HSA2000 series receiver spectrum analyzer, which connected with two dipole antennas in different frequency bands (15-80 MHz) low band antenna, and (110-240 MHz) high band antenna during the partial solar eclipse in Baghdad on October 25, 2022, at (12:00-15:00), as a simple radio telescope to observe the radio astronomical background level in the sky. It is clear that the average amount of RFI level during a partial solar eclipse (-83.249 dBm for LBA decreased by about (0.93) from the value on a normal day (-77.495 dBm). And For HBA -84.711 dBm decreased by about (0.85) from the value on a normal day (-72.784 dBm). Also, it was noticed that these amounts are approximately equal to the RFI level at night (-82.352 dBm for LBA and -82.739 dBm for HBA). It is (0.98) for LBA and (0.97) for HBA, respectively. This research confirms that despite the short duration of the partial eclipse, the average value during the partial eclipse period is close to the average values during the night period due to the decrease in the electronic density of the ionosphere, especially at low frequencies, and the FRI of ground disturbances as a result of the activities of human from the surrounding the monitoring area. also, found that at the monitoring point, there is a good relationship between the time of the maximum partial eclipse and the peaks of signal gain strength.

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Section: Introductionmentioning

confidence: 99%

Study of Sky Radio Frequency Interference Background Level Behavior During the Partial Solar Eclips on 25 Oct. 2022 at The Baghdad University Location

Kahdim,

Abood

2024

Al-Mustansiriyah Journal of Science

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“…Communications have recently developed widely, and the Dielectric Resonator Antenna (DRA) played a curial role in this due to its multitasking possibilities, which gave it many advantages in several applications. One of the most important applications is high-performance spacecraft, satellites and missiles [2].…”

Section: Introductionmentioning

confidence: 99%

Bandwidth Improvement of a Cone-Inverted Cylindrical and Cross Hybrids Dielectric Resonator Antennas

Areebi

Jabir

2023

IJP

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In this work, two cone-inverted cylindrical and cross-hybrid dielectric resonator antennas are stacked and excited by the coaxial probe method with an operating standard resonant frequency of 5.438 GHz. A drawback of these standard Dielectric Resonator Antennas (DRAs) is their narrow bandwidth. For good antenna performance, a stacked DR geometry and a thick dielectric substrate having a low dielectric constant are desired since this provides large bandwidth, better radiation power, reduces conductor loss and nonappearance of surface waves. Many approaches, such as changing the shape of the dielectric resonator, have been used to enhance bandwidth. Using DRA, having the lowest dielectric constant, increases the bandwidth and the electromagnetic energy. In the current work, bandwidth improvement was significantly achieved by the proposed geometry by varying the antenna size. A novel hybrid DRA configuration is used to increase the bandwidth of the antenna to 89.27% and 149.23% due to cone-inverted cylindrical and cross-hybrid dielectric resonator antennas, respectively. The DRA is designed numerically via Finite Difference Time Domain (FDTD) method. Several parameters like return loss, input impedance (verified at ) and radiation pattern are calculated. Furthermore, the stacked-hybrid technique is used to enhance the antenna's performance which is useful for broadband communication and the demand of wireless.

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“…The hydrogen line, also known as the 21-centimeter line, is a spectral line in the radio frequency range that is emitted by neutral hydrogen atoms. [2] It is a fundamental tool in radio astronomy as it allows astronomers to study the distribution and properties of hydrogen gas in the universe. This is particularly useful in understanding the structure and evolution of galaxies, and it has also been used to detect the presence of hydrogen gas in the interstellar medium and in various planetary bodies within our solar system.…”

Section: Introductionmentioning

confidence: 99%

Exploring the Solar System through Hydrogen Line Sprectum Radio Data Analysis

Dutta¹,

Saraswat²

2023

Preprint

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This research paper provides an in-depth analysis of the solar system usinga technique called hydrogen line radio data analysis. This method involvesstudying the spectral line emitted by neutral hydrogen atoms, known as thehydrogen line or the 21-centimeter line. Astronomers use this technique toexamine the distribution and characteristics of hydrogen gas within the universe.The researchers examined hydrogen line radio data from a range of sources inthis study to investigate the properties of hydrogen gas throughout the solarsystem. The emphasis was on identifying the presence of hydrogen gas in thesolar system's planets, moons, and other objects. Their findings revealed thathydrogen gas is found in numerous solar system objects, including the big planetsJupiter, Saturn, Uranus, and Neptune, as well as their moons. Furthermore,the researchers discovered hydrogen gas in comets and asteroids, indicatingthe presence of water, ice, and other volatile molecules. Overall, this researchdemonstrates the usefulness of hydrogen line radio data analysis in exploringthe properties of hydrogen gas within the solar system. It provides importantinsights into the composition and evolution of the solar system, and could alsobe applied to studying planetary systems beyond our own.

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Simulation of Small Radio Telescope Antenna Parameters at Frequency of 1.42 GHz

Cited by 4 publications

References 15 publications

Study of Sky Radio Frequency Interference Background Level Behavior During the Partial Solar Eclips on 25 Oct. 2022 at The Baghdad University Location

Study of Sky Radio Frequency Interference Background Level Behavior During the Partial Solar Eclips on 25 Oct. 2022 at The Baghdad University Location

Bandwidth Improvement of a Cone-Inverted Cylindrical and Cross Hybrids Dielectric Resonator Antennas

Exploring the Solar System through Hydrogen Line Sprectum Radio Data Analysis

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