Method of tuning a summing network
AssigneeNokia Corporation
InventorEero Koukkari
Life of this patent
Estimating the term…
Abstract
The present invention relates to a summing network comprising: a summing point (P) having interfaces for coupling summing network branches to the summing point, and an interface for coupling the summing point (P) to an antenna (ANT), and channel units (TX1 to TX3) arranged in the branches, and channel unit-specific band-pass filters (1 to 3), whose pass frequencies correspond to the frequency or frequencies of the corresponding channel unit. To facilitate tuning the summing network, a compensation element (7) is coupled to the summing network between the summing point (P) and the antenna (ANT), the load effect of said compensation element corresponding substantially to the load caused to the summing point (P) by the branches coupled to the summing point.
Claims12
A method of tuning a summing network, characterized by:
- determining the load caused to a summing point by summing network branches,
- selecting a compensation element whose load effect corresponds substantially to the load caused to the summing point by the summing network branches, and
- coupling said compensation element to the summing network between the summing point and an antenna.
A summing network comprising:
- a summing point (P) having interfaces for coupling summing network branches to the summing point, and an interface for coupling the summing point (P) to an antenna (ANT), and
- channel units (TX1 to TX3) arranged in the branches, and channel unit-specific band-pass filters (1 to 3), whose pass frequencies correspond to the frequency or frequencies of the corresponding channel unit, characterized in that a compensation element (7, 8, 11, 16) is coupled to summing network between the summing point (P) and the antenna (ANT), the load effect of said compensation element corresponding substantially to the load caused to the summing point (P) by the branches coupled to the summing point.
Dependencies are inferred from the claim text.