IKEA have a new wireless charging pad that is designed to fit under the desk to be more discrete. The Sjömärke is $40 in the US and will work with most desks or tables.
The Sjömärke will fit under the desk using the included double sided tape or by using some screws, which are not included.
IKEA say that it comes with a 1.8 metre power cord as well as an X shaped sticker to place on the table top, so you know where to place your phone.
The Sjömärke is coming to the IKEA website, as well as its stores next month.