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A Review on Natural Fibre Reinforced Composite Under UV Concentration for Aircraft Application
Published in Mohamed Thariq Hameed Sultan, Murugan Rajesh, Kandasamy Jayakrishna, Repair of Advanced Composites for Aerospace Applications, 2022
Syed Noor Hussain bin Mohamed Hasanuthin, A Hamdan, A R Irfan, Mohammad Sukri Mustapa, Mohamad Norani Mansor
The radome is a term that refers to a radar and dome hybrid. The radar on commercial and military aircraft, as well as some helicopters, is protected by an aerodynamically shaped dome. The radome is located in the aircraft’s nose. On military aircraft, such as jets, the length of the aircraft radome can be extended. The radome’s conical configuration aids the aircraft’s aerodynamics and is made of composite materials, most commonly glass fibre. A forward-looking radar system for weather detection is installed in the radome of commercial aircraft. The radome protects the weather radar on the nose of the aircraft. Weather radars operate at particular frequencies, which the radome assembly must efficiently transmit around to enable the tool to operate correctly. Radomes are vulnerable to many types of damages, including rain, bird strikes and damage caused by ground infrastructures such as hangar doors and repair equipment (Haris et al. 2011). Any kind of damage to the radome will make it susceptible to moisture flow into the fibreglass structures, which may prevent the unique frequency from hitting the weather radar. A transmission performance test calculates how effectively the weather radar transmits and absorbs electromagnetic activity (Botelho, Nohara, and Rezende 2015).
Design of Frequency Selective Surface (FSS) Printed Antennas
Published in Binod Kumar Kanaujia, Surendra Kumar Gupta, Jugul Kishor, Deepak Gangwar, Printed Antennas, 2020
Kanishka Katoch, Naveen Jaglan, Samir Dev Gupta, Binod Kumar Kanaujia
Antennas or radar systems are vulnerable to the physical environment; consequently, the performance gets affected when exposed to the outer world. Therefore, radomes came into existence. A radome is a protective layer that is positioned around an antenna or radar to protect it from physical wear and tear with least impact on the performance [102]. FSS due to its unique property of manipulating the EM waves is a good option to make hybrid radomes. FSS radomes can work in absorption band [103], reflection band [104], and passband [105] for various military and commercial requirements. With the development of stealth technology and detection, a low radar cross section is of utmost importance. If the FSS radomes are transparent to EM waves, the transmission of the signal is smooth. However, if they are opaque, the entire incoming signal gets reflected. Due to the dome shape of the radomes, the energy is reflected and backscatters in bistatic direction; therefore, the back-reflected signals become weak in strength in different directions. Hence, the RCS is reduced [1]. Radomes are suitable for other applications as well, such as weather broadcast, telemetry, satellite, radio astronomy, and surveillance. The comparison of monostatic RCS of FSS radomes and dielectric radomes in [106] makes it clear that FSS radomes control the RCS of the antenna better than dielectric radomes. It is shown in Figure 12.23.
The Finite Difference Time Domain Technique for Microstrip Antenna Applications
Published in Lal Chand Godara, Handbook of Antennas in Wireless Communications, 2018
Atef Z. Elsherbeni, Christos G. Christodoulou, Javier Gómez-Tagle
A radar dome, or radome, is a protective dielectric housing for a microwave or millimeter wave antenna. The function of the radome is to protect the antenna from adverse environments in ground-based, shipboard, airborne, and aerospace applications while having insignificant effect on the electrical performance of the enclosed antenna or antennas. The frequency band of application for radomes is approximately from 1 to 1000 GHz.
UHMWPE textiles and composites
Published in Textile Progress, 2022
Ashraf Nawaz Khan, Mohit Gupta, Puneet Mahajan, Apurba Das, R. Alagirusamy
Another application is in the field of radar absorbing structure (RAS). The radome is a protective cover for a radar (radio detection and ranging) antenna and the materials; used in its manufacture need to possess good mechanical properties and a low dielectric constant. However, the RAS itself needs to be made of the same kind of material but having high electro-conductive properties to improve electromagnetic wave absorption characteristics, so nano-conductive particles are incorporated into the UHMWPE fabric to protect the RAS against external loads. Consequently, with advancements in modern radar systems, stealth technology requires further improvements to minimise detectability. Given that the detectable distance of the radar is directly proportional to the radar cross-section (RCS) (Lee, Choi, & Lee, 2015). The RCS can be reduced in different ways such as those used in the low-observable design based on a combination of stealth shaping, radar-absorbing material (RAM), and a radar-absorbing structure (RAS) (as shown in Figure 110).
Electromagnetic wave-transparent model for 2D woven composites ellipsoid radome
Published in Mechanics of Advanced Materials and Structures, 2023
Yin Jianjun, Ma Wensuo, Gao Zuobin, Jia Chenhui, Lei Xianqing
Radome is the protective device of antenna systems, used to isolate the interference of external environment and its shape is usually related to antenna or antenna array [1, 2]. Due to high cost and difficult processing, traditional metal materials of radome are difficult to meet the development direction of lightweight, miniaturization, high performance and multifunction [3, 4]. Therefore, new radome materials such as ceramic based materials, honeycomb structure materials and woven structure materials have been studied by scholars [5–7].