US Patent No. 9,559,422

COMMUNICATION DEVICE AND METHOD FOR DESIGNING MULTI-ANTENNA SYSTEM THEREOF


Patent No. 9,559,422
Issue Date January 31, 2017
Title Communication Device And Method For Designing Multi-antenna System Thereof
Inventorship Kin-Lu Wong, Kaohsiung (TW)
Yeh-Chun Kao, Taoyuan County (TW)
Po-Wei Lin, Taichung (TW)
Wei-Yu Li, Yilan County (TW)
Assignee Industrial Technology Research Institute, Hsinchu (TW) National Sun Yat-se...

Claim of US Patent No. 9,559,422

1. A communication device, comprising:
a ground conductor portion comprising at least a first radiating edge and a second radiating edge; and
a multi-antenna system, comprising at least:
a first resonant portion disposed on the first radiating edge of the ground conductor portion, the first resonant portion
comprising a first electrically coupling portion and a first switch, wherein the first resonant portion has a loop resonant
structure or an open-slot resonant structure, and the first resonant portion has a first resonant path, the first switch is
disposed on the first resonant path, the first electrically coupling portion makes the length of the first resonant path less
than or equal to 0.18 times the wavelength of the lowest operating frequency of the multi-antenna system, thereby exciting
the first radiating edge to form a strong surface current distribution, and generating a first effective radiating energy
and at least one first resonant mode covering at least one first operating band, the first effective radiating energy generated
having a first strongest radiation direction;

a second resonant portion disposed on the second radiating edge of the ground conductor portion, the second resonant portion
comprising a second electrically coupling portion and a second switch, wherein the second resonant portion has a loop resonant
structure or an open-slot resonant structure, and the second resonant portion has a second resonant path, the second switch
is disposed on the second resonant path, the second electrically coupling portion makes the length of the second resonant
path less than or equal to 0.18 times the wavelength of the lowest operating frequency of the multi-antenna system, thereby
exciting the second radiating edge to form a strong surface current distribution, and generating a second effective radiating
energy and at least one second resonant mode covering at least the first operating band, the second effective radiating energy
generated having a second strongest radiation direction;

a first control circuit respectively and electrically coupled to the first resonant portion and the second resonant portion
through a plurality of signal lines, the first control circuit switching a signal source to electrically couple to one of
the first resonant portion or the second resonant portion, and generating the first strongest radiation direction or the second
strongest radiation direction, or controlling the signal source to concurrently electrically couple to the first resonant
portion and the second resonant portion, and generating a third effective radiating energy having a third strongest radiation
direction; and

a second control circuit respectively and electrically coupled to the first switch and the second switch through a plurality
of signal lines, the second control circuit switching the first switch to a conducting state when the signal source is electrically
coupled to the first resonant portion, and switching the second switch to the conducting state when the signal source is electrically
coupled to the second resonant portion.