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.