Ch. 4 Antennas
1
A SISO system has how many radio chains?
3
A wireless device designated as 2x3:1 has how many Rx antennas?
elevation
A(n) ______ chart shows the vertical coverage area of an antenna.
antenna diversity
APs with multiple antennas employ _____ to improve reception.
bidirectional
Amplifiers for wireless LANs are ______ .
sectored antenna
An antenna that divides the entire 360 degrees of coverage area into eight sectors of 45 degrees each is called a ______ .
power directed to an antenna
An intentional radiator (IR) is ______ .
fade margin
Another name for system operating margin (SOM) is _____ .
half-power
Beamwidth is considered a measure of the antenna's _____ range.
in a plenum without a special enclosure
Each of the following is a good location for installing an AP except:
180
Generally, a semidirectional antenna will only transmit its signal no more than _____ degrees.
60
The general rule is that ______ percent of the first Fresnel zone must be clear of obstacles.
a non-MIMO device sends to a MIMO device
The maximal ratio combining (MRC) algorithm is used when _______ .
polarization
The orientation of radio waves as they leave an antenna is called ____ .
a gain that is 100 percent
The outer circle of an antenna radiation chart represents ______ .
dBi
The passive gain increase of power that is funneled from an antenna compared to that of an isotropic radiator is called ______.
return loss
When the VSWR is indicated in dB it is called the ______ .
Equivalent Isotropically Radiated Power (EIRP)
_____ is the power radiated out by the wireless system and includes any antenna gain.
Spatial diversity
______ sends redundant streams in parallel.
dBd
_______ compares the antenna gain against that of a dipole antenna.