Optically steerable antenna array for radio over fibre transmission

Low loss LTCC (Low Temperature Cofired Ceramics) materials have already demonstrated their virtues for high density packaging of mm-wave modules and their capability to handle the inherent requirements of heat dissipation. A 60 GHz substrate integrated waveguide fed steerable antenna array is one example of the driving applications for new challenges in the LTCC process. This antenna is suitable for transmit and receive in the 60 GHz WPAN frequency band [1]. Integrating antenna array and mm-wave front-end in one module is a consequent way to avoid amplitude and phase uncertainties associated with connectors and cables. A compact module also helps to reduce losses in the signal path by providing short interconnects. This is important for mm-Wave systems, particularly for the receiver. The antenna design presented here requires a three-dimensional surface structure with features like small and precise cavities and grooves. Different methods to fabricate cavities in LTCC modules will be discussed and a new method which proved suitable for the demanding application will be presented in detail.

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Dual-Circularly Polarized 60 GHz Beam-Steerable Antenna Array with 8 × 8 Butler Matrix

Applied Sciences ◽

10.3390/app10072413 ◽

2020 ◽

Vol 10 (7) ◽

pp. 2413 ◽

Cited By ~ 1

Author(s):

Yuntae Park ◽

Jihoon Bang ◽

Jaehoon Choi

Keyword(s):

Circular Polarization ◽

Antenna Array ◽

Mutual Coupling ◽

Beam Steering ◽

60 Ghz ◽

Circularly Polarized ◽

Butler Matrix ◽

Left Handed ◽

Steerable Antenna ◽

The Right

A beam-steerable dual-circularly polarized 60 GHz antenna array is proposed. A 1 × 4 dual-fed stacked patch antenna array is integrated with an 8 × 8 Butler matrix. By utilizing the 8 × 8 Butler matrix, the proposed antenna array generates dual-circular polarization with beam-steering capability. The proposed antenna array system demonstrates good reflection coefficients in the frequency band ranging from 55.3 GHz to 64.9 GHz and has a mutual coupling of less than −10 dB over the frequency range of 57.5 GHz–63.2 GHz. At 60 GHz, the maximum gains and beam-steering angles for input ports 2, 4, 5, and 7 are 9.39 dBi at −38°, 10.67 dBi at −11°, 10.63 dBi at +11°, and 9.38 dBi at +39°, respectively. It is also demonstrated that the dual-polarization is well formed by switching the excitation ports. The right-handed circular polarization (RHCP) is formed when four ports from port 1 to port 4 are excited and left-handed circular polarization (LHCP) is formed when four ports from port 5 to port 8 are excited. The proposed antenna array system could be a good candidate for millimeter-wave 5G applications that require wide beam coverage and polarization diversity.

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A Compact Ku-Band Active Electronically Steerable Antenna with Low-Cost 3D T/R Module

Wireless Communications and Mobile Computing ◽

10.1155/2019/5287679 ◽

2019 ◽

Vol 2019 ◽

pp. 1-8

Author(s):

Zheng Xu ◽

Chengxiang Hao ◽

Kuiwen Xu ◽

Shichang Chen

Keyword(s):

Antenna Array ◽

System Integration ◽

Low Cost ◽

Axial Ratio ◽

Antenna System ◽

Measurement Results ◽

Steerable Antenna ◽

Vertical Interconnection ◽

Electronic Steering ◽

Ku Band

This paper presents a novel compact Ku-band active electronically steerable antenna array design with a low-cost and integrated T/R 3D module employed for airborne synthetic aperture radar (SAR) systems. The entire system adopts 3D multilayer technology with vertical interconnection to construct the hermetically packaging RF modules. By assembling different multifunctional modules into a whole multilayer board, the 3D T/R technique greatly improves the system integration and reduces implementation cost and size. Besides, a wideband circular polarized antenna array was designed in LTCC and connected to the proposed T/R modules to form a complete AESA. The whole proposed antenna system has been fabricated and experimentally investigated. Measurement results showed very good phased array performances in terms of gain, axial ratio, and radiating patterns. The low-cost, lightweight, and low-power features exhibited by the proposed design validate its applicability for weight and power constrained platforms with great electronic steering ability.

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