&gt; With electronically controlled delays between elements, it is possible to make an electronically steerable antenna.<p>Multiple current and future radio telescopes are using this technique with dipole arrays at low frequencies, including LOFAR[0], the LWA[1], and eventually the SKA[2].<p>[0] <a href="http:&#x2F;&#x2F;lofar.org&#x2F;" rel="nofollow">http:&#x2F;&#x2F;lofar.org&#x2F;</a> <a href="http:&#x2F;&#x2F;link.springer.com&#x2F;chapter&#x2F;10.1007&#x2F;978-3-642-23397-5_33" rel="nofollow">http:&#x2F;&#x2F;link.springer.com&#x2F;chapter&#x2F;10.1007&#x2F;978-3-642-23397-5_3...</a><p>[1] <a href="http:&#x2F;&#x2F;lwa.phys.unm.edu&#x2F;abouthome.html" rel="nofollow">http:&#x2F;&#x2F;lwa.phys.unm.edu&#x2F;abouthome.html</a><p>[2] <a href="https:&#x2F;&#x2F;www.skatelescope.org&#x2F;" rel="nofollow">https:&#x2F;&#x2F;www.skatelescope.org&#x2F;</a>