In this paper, we propose a ball grid array (BGA) module with integrated 3D-printed plastic lens and dedicated 120 GHz OOK transceiver for 5G Backhaul/Fronthaul applications. The problem to be addressed is the following: 5G future networks will need backhaul/fronthaul 10Gbps wireless links and it's mandatory to design cost-effective and energy efficient solutions. The proposed solution is made of 3D-printed plastic lens antenna and cheap 7×7×0.362 mm 3 BGA module integrating a 2×2 array of aperture-coupled patch antennas as the source of the lens. The measurement results of the full system confirm the expected performance of the plastic lens: a-10dB matching and a 28 dBi realized gain from 114 to 140 GHz. The active measurements allows a Tx/Rx link >12Gbps data transmission with <10-6 BER at nearly 5m. This link is realized with an energy-efficiency better than 1.6 pJ/b/s which is at least 40 times better than state-ofthe-art high-speed existing TRx's. Those promising results pave the way for future cost-effective and low consumption backhaul/fronthaul systems for 5G communications. What is the novelty of your work over the existing work (100 words)? So far, several wireless links at 120 GHz have been deployed by various authors with very high Gbps speed but at the expense of high DC consumption and bulky material which is in turn correspond to weak integration of the full-system. The novelty of our work lies in the fact that every communicating block has been optimized in conjunction with all the other nearby elements, strongly taking into account cost and integration capability. Therefore a Tx/Rx link >12Gbps data transmission with <10-6 BER at nearly 5m. This link is realized with an energy-efficiency better than 1.6 pJ/b/s which is at least 40 times better than state-of-the-art high-speed existing TRx's. Provide up to three references, published or under review, (journal papers, conference papers, technical reports, etc.) done by the authors/coauthors that are closest to the present work. Upload them as supporting documents if they are under review or not available in the public domain. Enter "N.A." if it is not applicable. [1] A.

This paper presents a portable system for freehand antenna diagnosis and characterization based on amplitude-only data. The amplitude-only samples are acquired by moving a handheld probe, which is tracked by a motion capture system, in front of the antenna under test (AUT) aperture. The acquired measurements are processed using the phaseless sources reconstruction method to compute an equivalent currents distribution on the AUT aperture. Finally, the radiation pattern of the AUT can be obtained evaluating the corresponding radiation integrals. Unlike previous work, the use of amplitude-only data avoids the need of a phase reference, paving the way to the diagnosis and characterization of antennas under operational conditions. This fact, together with the handheld capabilities, make the system very convenient for measurements of already deployed and onboard antennas. Moreover, these amplitude-only acquisitions also simplify the required hardware. The system has been validated through measurements in a wide frequency range from Ka-band up to 300 GHz. Despite one cannot expect the same degree of accuracy that can be achieved under laboratory conditions (including an anechoic environment and highly accurate positioners), the system shows excellent capabilities to detect malfunctions such as wrong amplitude/phase distributions, as well as a fair estimation of the far-field.

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