Multiple-input multiple-output (MIMO) technology is maturing and is being incorporated into emerging wireless broadband standards like long-term evolution (LTE) [1]. For example, the LTE standard allows for up to eight antenna ports at the base station. Basically, the more antennas the transmitter/receiver is equipped with, and the more degrees of freedom that the propagation channel can provide, the better the performance in terms of data rate or link reliability. More precisely, on a quasi static channel where a code word spans across only one time and frequency coherence interval, the reliability of a point-to-point MIMO link scales according to Prob(link outage) ` SNR-ntnr where nt and nr are the numbers of transmit and receive antennas, respectively, and signal-to-noise ratio is denoted by SNR. On a channel that varies rapidly as a function of time and frequency, and where circumstances permit coding across many channel coherence intervals, the achievable rate scales as min(nt, nr) log(1 + SNR). The gains in multiuser systems are even more impressive, because such systems offer the possibility to transmit simultaneously to several users and the flexibility to select what users to schedule for reception at any given point in time [2].

/pdf/scaling-up-mimo-opportunities-and-challenges-with-very-large-puqp9v7gzk.pdf

Scaling Up MIMO: Opportunities and Challenges with Very Large Arrays

https://www.mit.edu/~soljacic/wireless-power_AoP.pdf

Efficient wireless non-radiative mid-range energy transfer

This paper gives a basic review and a summary of recent developments for leaky-wave antennas (LWAs). An LWA uses a guiding structure that supports wave propagation along the length of the structure, with the wave radiating or “leaking” continuously along the structure. Such antennas may be uniform, quasi-uniform, or periodic. After reviewing the basic physics and operating principles, a summary of some recent advances for these types of structures is given. Recent advances include structures that can scan to endfire, structures that can scan through broadside, structures that are conformal to surfaces, and structures that incorporate power recycling or include active elements. Some of these novel structures are inspired by recent advances in the metamaterials area.

Leaky-Wave Antennas

Nanoantennas for visible and infrared radiation can strongly enhance the interaction of light with nanoscale matter by their ability to efficiently link propagating and spatially localized optical fields. This ability unlocks an enormous potential for applications ranging from nanoscale optical microscopy and spectroscopy over solar energy conversion, integrated optical nanocircuitry, opto-electronics and density-of-states engineering to ultra-sensing as well as enhancement of optical nonlinearities. Here we review the current understanding of metallic optical antennas based on the background of both well-developed radiowave antenna engineering and plasmonics. In particular, we discuss the role of plasmonic resonances on the performance of nanoantennas and address the influence of geometrical parameters imposed by nanofabrication. Finally, we give a brief account of the current status of the field and the major established and emerging lines of investigation in this vivid area of research.

https://iopscience.iop.org/article/10.1088/0034-4885/75/2/024402/pdf

Nanoantennas for visible and infrared radiation.

http://www.diit.unict.it/users/spalazzo/materiale/Electromagnetic_Nanosensors.pdf

Electromagnetic wireless nanosensor networks

Antenna theory; analysis and design

If the world should blow itself up, the last audible voice would be that of an expert saying, “It can’t be done.” 

Are We There Yet? [Microwave Surfing]

It&#x2019;s kind of embarrassing. It&#x2019;s the most energetic process on the planet, we have religions centered around this thing, and we have no idea how it works. 

An Electrical Fairy Tale? [Microwave Surfing]

In the prologue to his new book <xref ref-type="bibr" rid="ref1" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">[1]</xref> , Canadian scientist Jacob Van Dyk reports the following incident from his own life 

/pdf/never-the-twain-shall-meet-turnstile-8l1tk396.pdf

Never the Twain Shall Meet? [Turnstile]

In his delightful memoir, <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">Love &amp; Math</i> <xref ref-type="bibr" rid="ref1" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">[1]</xref> , mathematician Edward Frenkel shares the following “anecdote” about wireless telegraphy: 

/pdf/it-all-started-with-marconi-turnstile-3jtbwqrn.pdf

R. Bansal

Papers

Antenna theory; analysis and design

Are We There Yet? [Microwave Surfing]

An Electrical Fairy Tale? [Microwave Surfing]

Never the Twain Shall Meet? [Turnstile]

It All Started With Marconi [Turnstile]