Conformal Antennas on Liquid Crystalline Polymer Based Rigid-Flex Substrates Integrated With the Front-End Module

Altunyurt, Nevin; Rieske, Ralf; Swaminathan, Madhavan

doi:10.1109/tadvp.2009.2020517

Cited by 17 publications

(6 citation statements)

References 16 publications

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“…In 2008, the surface-mounted integration and packaging of LNA in the Ka-band was reported, demonstrating a measured leak rate of as low as 3.6 × 10 −8 atm•cc/s [112]. Conformal inverse L-shaped monopole antenna integrated and packaged for WLAN/WiMax applications was reported at 5 GHz in 2009 [113], introducing a method for the direct integration of a large antenna element into a small module package. In 2013, Chlieh et al integrated gallium nitride (GaN) amplifiers and microfluidic cooling in a multilayer LCP substrate for high-power applications at 5 GHz [114].…”

Section: Chip Integration and Packgingmentioning

confidence: 99%

Flexible Liquid Crystal Polymer Technologies from Microwave to Terahertz Frequencies

Zhou

Qian

et al. 2022

Molecules

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With the emergence of fifth-generation (5G) cellular networks, millimeter-wave (mmW) and terahertz (THz) frequencies have attracted ever-growing interest for advanced wireless applications. The traditional printed circuit board materials have become uncompetitive at such high frequencies due to their high dielectric loss and large water absorption rates. As a promising high-frequency alternative, liquid crystal polymers (LCPs) have been widely investigated for use in circuit devices, chip integration, and module packaging over the last decade due to their low loss tangent up to 1.8 THz and good hermeticity. The previous review articles have summarized the chemical properties of LCP films, flexible LCP antennas, and LCP-based antenna-in-package and system-in-package technologies for 5G applications, although these articles did not discuss synthetic LCP technologies. In addition to wireless applications, the attractive mechanical, chemical, and thermal properties of LCP films enable interesting applications in micro-electro-mechanical systems (MEMS), biomedical electronics, and microfluidics, which have not been summarized to date. Here, a comprehensive review of flexible LCP technologies covering electric circuits, antennas, integration and packaging technologies, front-end modules, MEMS, biomedical devices, and microfluidics from microwave to THz frequencies is presented for the first time, which gives a broad introduction for those outside or just entering the field and provides perspective and breadth for those who are well established in the field.

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Section: Chip Integration and Packgingmentioning

confidence: 99%

Flexible Liquid Crystal Polymer Technologies from Microwave to Terahertz Frequencies

Zhou

Qian

et al. 2022

Molecules

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show abstract

“…The loss measurement and mechanical measurement show that the influence of LCP packaging on the performance of the phase shifter can be ignored, but it can maintain the equipment’s flexibility and protect it against various environmental conditions. LCPs are not only used in flexible RF MEMS, but also widely used in various flexible conformal RF devices and in various flexible MEMS sensors [ 107 , 108 , 109 , 110 , 111 , 112 , 113 , 114 , 115 ].…”

Section: Materials For Flexible Rf Memsmentioning

confidence: 99%

Recent Advances in Flexible RF MEMS

Shi

Shen

2022

Micromachines

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Microelectromechanical systems (MEMS) that are based on flexible substrates are widely used in flexible, reconfigurable radio frequency (RF) systems, such as RF MEMS switches, phase shifters, reconfigurable antennas, phased array antennas and resonators, etc. When attempting to accommodate flexible deformation with the movable structures of MEMS, flexible RF MEMS are far more difficult to structurally design and fabricate than rigid MEMS devices or other types of flexible electronics. In this review, we survey flexible RF MEMS with different functions, their flexible film materials and their fabrication process technologies. In addition, a fabrication process for reconfigurable three-dimensional (3D) RF devices based on mechanically guided assembly is introduced. The review is very helpful to understand the overall advances in flexible RF MEMS, and serves the purpose of providing a reference source for innovative researchers working in this field.

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“…Various polymer materials such as polyimide [ 160 ], PET, PDMS [ 161 , 162 ], and liquid polymer (LP) [ 163 , 164 ] were used for flexible and transparent antennas because they provided high flexibility, low loss, and thicknesses. Moreover, polymer materials show good electrical and mechanical properties, which give them the ability of deformation in wearable antennas [ 165 ]. Among flexible substrates, polymer substrates are commonly used for the wearable antennas or in complex designs, like liquid metal antennas [ 166 , 167 ].…”

Section: Flexible Materialsmentioning

confidence: 99%

Recent Advances of Wearable Antennas in Materials, Fabrication Methods, Designs, and Their Applications: State-of-the-Art

et al. 2020

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The demand for wearable technologies has grown tremendously in recent years. Wearable antennas are used for various applications, in many cases within the context of wireless body area networks (WBAN). In WBAN, the presence of the human body poses a significant challenge to the wearable antennas. Specifically, such requirements are required to be considered on a priority basis in the wearable antennas, such as structural deformation, precision, and accuracy in fabrication methods and their size. Various researchers are active in this field and, accordingly, some significant progress has been achieved recently. This article attempts to critically review the wearable antennas especially in light of new materials and fabrication methods, and novel designs, such as miniaturized button antennas and miniaturized single and multi-band antennas, and their unique smart applications in WBAN. Finally, the conclusion has been drawn with respect to some future directions.

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Conformal Antennas on Liquid Crystalline Polymer Based Rigid-Flex Substrates Integrated With the Front-End Module

Cited by 17 publications

References 16 publications

Flexible Liquid Crystal Polymer Technologies from Microwave to Terahertz Frequencies

Flexible Liquid Crystal Polymer Technologies from Microwave to Terahertz Frequencies

Recent Advances in Flexible RF MEMS

Recent Advances of Wearable Antennas in Materials, Fabrication Methods, Designs, and Their Applications: State-of-the-Art

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