February 2018
Page 2–3
Chapter 2. Purpose, Basic operation & Testing
Input 1
Balance
Port
Transhybrid
Loss – Isolation
=
dB
∞
Input 2
Output
TX Path
Loss = 0 dB
IDEAL
HYBRID
TX / RX Path
Loss = 0 dB
Figure 2–2.
Ideal hybrid Characteristics.
Hybrid Type:
Ideal
Balanced
Skewed
Insertion Loss
Loss IN 1 to OUT:
0 dB
3.5 dB Max
0.5 dB Max
Insertion Loss
Loss IN 2 to OUT:
0 dB
3.5 dB Max
14.5 dB Max
Transhybrid Loss*
Isolation IN 1 to IN2:
∞
dB
30 dB Min
40 dB Min
Table 2–1. hybrid Losses.
2.2 Ideal Hybrid Characteristics
• Two input ports are completely isolated from one another.
• Two input ports have no loss to the output port.
• Internal balance port Z = Output port’s connected Z
(There is infinite isolation for inputs when these impedances are exactly equal.)
* With exact impedance matching on output.
