This technology is a quadrature hybrid circuit designed to communicate on multiple frequency bands.
To meet the demands of ever-increasing data throughput, carrier aggregation (CA) between different frequency bands has become necessary. Differing spectrum allocations around the globe lead to a very large number of band combinations and put demanding performance requirements on antenna interfaces. Sometimes multiple antennas are used, but the small factor of mobile terminals severely limits the number of antennas. Alternatively, antenna signals can be split with filter banks and switches, but this method quickly becomes very complex and costly due to the large number of band combinations. Therefore, new circuits for wireless communication capable of handling multiple frequencies are needed.
This technology utilizes a first quadrature hybrid circuit to achieve multifrequency communication. The circuit can be configured as a receiver, transmitter, or transceiver; in the transceiver configuration, a switch is used to control the transmitter-to-receiver communication to guarantee that only one signal passes at a time. An antenna detects the input signal, which is passed through a digital to analog converter, followed by a filter, mixer, and power amplifier. The signal continues to the receiver where it is passed through a low noise amplifier, mixer, and filter before being converted back from analog to digital. The transmitter and receiver are connected to a second transmitter and receiver respectively via complex Cartesian combiners. The second transmitter and receiver are connected via the thru port and execute the same process as the first transmitter and receiver. Through this configuration, one circuit can be used to wirelessly communicate on multiple frequency bands.
IR CU17161
Licensing Contact: Greg Maskel
