Handheld electronic devices with isolated antennas

A handheld electronic device, comprising:

• a housing having lateral dimensions;
• a substantially rectangular ground plane element having lateral dimensions substantially equal to the lateral dimensions of the housing, wherein portions of the rectangular ground plane element define a dielectric-filled rectangular slot at one end of the rectangular ground plane element;
• and
• first and second antennas having respective first and second antenna resonating elements, wherein the first antenna comprises a hybrid planar-inverted-F and slot antenna in which the first antenna resonating element comprises a planar resonating element that is located above the slot, wherein the planar resonating element comprises an isolation element that resonates at a common frequency with the second antenna and reduces interference between the second antenna and the first antenna during simultaneous operation of the first and second antennas.

A wireless handheld electronic device comprising:

• storage that stores data;
• processing circuitry coupled to the storage that generates data for wireless transmission and that processes wirelessly received data;
• and
• wireless communications circuitry, wherein the wireless communications circuitry comprises:
• transceiver circuitry;
• first and second antennas;
• and
• first and second transmission lines, wherein the first transmission line has a ground conductor and has a signal conductor and conveys radio-frequency signals for the first antenna between the transceiver circuitry and the first antenna, wherein the second transmission line has a ground conductor and has a signal conductor and conveys radio-frequency signals for the second antenna between the transceiver circuitry and the second antenna, wherein the first antenna and operates in a first frequency range and a second frequency range, wherein the second antenna operates in a third frequency range that is different than the first and second frequency ranges, wherein the first antenna comprises a planar ground element with a dielectric-filled slot and a planar resonating element located above the slot, and wherein the planar resonating element comprises an antenna isolation element that resonates in the third frequency range and isolates the first antenna and the second antenna in the third frequency range.

First and second antennas for use in a handheld device that has a substantially rectangular housing with lateral dimensions, comprising:

• a substantially rectangular ground plane antenna element having lateral dimensions substantially equal to the lateral dimensions of the housing, wherein the ground plane antenna element serves as ground for the first and second antennas;
• a first planar antenna resonating element associated with the first antenna and a second planar antenna resonating element associated with the second antenna, wherein the first antenna operates in a first frequency range and a second frequency range, wherein the second antenna operates in a third frequency range that is different than the first and second frequency ranges;
• and
• an antenna isolation element that resonates in the third frequency range and that isolates the first antenna and the second antenna in the third frequency range.

Wireless communications circuitry in a handheld electronic device comprising:

• first and second wireless transceiver circuits that transmit and receives radio-frequency signals;
• first and second antennas comprising respective first and second antenna resonating elements, wherein the first antenna and first wireless transceiver circuit operate in at least a first communications band and wherein the second antenna and second wireless transceiver circuit operate in at least a second communications band that is different than the first communications band;
• and
• an antenna isolation element associated with the first antenna resonating element, wherein the antenna isolation element and the second antenna are configured to resonate in the second communications band and wherein when the second wireless transceiver circuit transmits wireless radio-frequency signals through the second antenna, the antenna isolation element reduces signal interference between the first antenna and the second antenna.