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Antenna is a Latin word,with the meaning of sail
yard.Nowadays,it is a kind of device used for sending or receiving
signals. Antennas are of various types, categorized by frequency,
location, style and so forth. Antennas types in our modern society
can be applied to distinguish antennas for radio,tv and radar
systems.One of the radio antennas is patch antenna,which is also
called rectangular microstrip antenna and is the primary type of
microstrip antenna. It contains an important smooth
rectangle-shaped piece or maybe "patch" of metal, and it is fixed
on a larger piece of metal known as a ground plane.
Now,let us talk about patch antennas covering subjects including:
the basic qualities of patch antennas by making use of the simple
and easy rectangle-shaped patch, radiation pattern, and related
aspects,such as bandwidth. Compared with other antennas,it
impressed us greatly for it is easy to carry, economical, and
convenient to incorporate with accompanying electronic
products.What’s more, It is not difficult for us to fabricate,
modify and customize the patch antenna.Then there comes the
radiation patterns of the patch antenna.The patch antenna owns some
far-field patterns of radiation.From the radiation pattens we get
the information that the antenna radiates much more electrical
power in some direction than another direction.In other words, the
antenna is believed to contain specific directivity which is
generally mentioned in dB.And we can easily derive the estimation
of the antenna’s predicted directivity.A 3dB directivity is often
referred to as a best front-to-back ratio.In practical
situations,this kind of front-to-back ratio is seriously reliant on
the size and shape of ground-plane.When there are two slots,we can
add another 3 dB.The slots are usually as long as the patch’s
impedance width and as wide as the patch’s substrate height. This
sort of slot normally seems to have a gain of roughly two to three
dB which will lead to a whole gain of eight to nine dB.It is known
that one of the crucial parameters of antenna is the bandwidth that
it can cover. In most occasions,it is only bandwidth that is
specified.As for patch antenna,it owns impedance
bandwidth,polarization bandwidth ,efficiency bandwidth as well as
directivity bandwidth.D irectivity is usually go along with gain
bandwidth and so is efficiency.
In October 20, 2009,patch antennas was released by Taoglas,which is
a antenna provider coming from San Diego, California. Taoglas also
has unveiled its SGP series . Taoglas has taken advantage of the
traditional technology of the patch antenna to mount the desired
antenna PCB,which is short for printed circuit board,and then
presented the actual feed-point outside to one of the sides of the
patch without the need of showing the feedline. Due to the fact
this kind of antenna is placed onto a PCB, there is certainly no
pin protruding. Dermot O'Shea once show his praises for it and in
his opinion, for the very first time, the aerial as well as module
are able to currently be positioned on exactly the same side of the
board,releasing useful real-estate upon lightweight cell products.
SGS certification came into being as a result of the SGP antennas
for their durablilty and resilience to stand up the temperatures as
low as -40 degrees celsius and as high as 105 degrees celsius and
for their ability to bear the vibrations of twenty G.
In conclusion,patch antenna is a kind of radio antenna and it is of
great importance in our daily life.From the text we get to know the
definition,function and basic concepts of the patch antenna.
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