Dual band plug-on transmitter antenna

Patent metadata

Field	Value
Publication number	US-12249774-B2
Application number	US-202217872342-A
Country	US
Kind code	B2
Filing date	Jul 25, 2022
Priority date	Jul 25, 2022
Publication date	Mar 11, 2025
Grant date	Mar 11, 2025

Abstract

A wireless microphone system utilizes an antenna structure that supports dual frequency bands. With some embodiments, the wireless microphone system comprises a first apparatus (for example, a wireless transmitter) and an attached second apparatus (for example, an attached microphone), where the chassis of the first apparatus and the housing of the second apparatus support the antenna structure through an electrical connector (for example, through an outer shell of a Cannon (XLR) connector) between the two apparatuses. The chassis and the housing may support first and second halves of a dipole antenna, respectively. The first apparatus supports first and second electrical circuits that are operational within a first and second frequency band, respectively, and that connect to first and second input ports of a combining circuit (for example, a diplexer filter). The output port of the combining circuit connects to the housing through the electrical connector.

First claim

What is claimed is:

1. A wireless apparatus comprising:
a first electrical circuit configured to process a first RF signal within a first frequency band;
a second electrical circuit configured to process a second RF signal within a second frequency band;
a chassis accommodating the first and second electrical circuits, wherein an electrical ground of the first and second electrical circuits are electrically connected to the chassis; and
an electrical connector electrically connecting the wireless apparatus to an attached electrical apparatus,
wherein a combined RF signal comprises the first RF signal within the first frequency band and the second RF signal within the second frequency band,
wherein a housing of the attached electrical apparatus is configured to electrically couple the combined RF signal through the electrical connector,
wherein the chassis of the wireless apparatus and the housing of the attached electrical apparatus support an antenna that is operational at both the first and second frequency bands, and
wherein the chassis supports a first portion of the antenna and the housing supports a second portion of the antenna.

2. The wireless apparatus of claim 1 further comprising:
an electrical insulator separating the electrical connector from the chassis.

3. The wireless apparatus of claim 1 , further comprising:
a combining circuit having first and second ports operational only at the first and second frequency bands, respectively, and a third port operational at both the first and second frequency bands,
wherein the first and second electrical circuits electrically connect to the first and second ports of the combining circuit, respectively,
wherein the third port of the combining circuit electrically connects to a first component of the electrical connector, and
wherein the first component of the electrical connector electrically connects to the housing of the attached electrical apparatus.

4. The wireless apparatus of claim 3 , wherein the first component of the electrical connector comprises an outer shell.

5. The wireless apparatus of claim 3 , wherein the combining circuit comprises a diplexer filter.

6. The wireless apparatus of claim 3 , further comprising a matching circuit, wherein the third port of the combining circuit connects to the first component of the electrical connector through the matching circuit and provides a predetermined degree of impedance matching between the combining circuit and the antenna.

7. The wireless apparatus of claim 6 , wherein the matching circuit comprises at least one electrically tunable element.

8. The wireless apparatus of claim 7 further comprising:
a control circuit configured to configure the at least one electrically tunable element is based on an identity of the attached electrical apparatus, wherein the attached electrical apparatus is one of a plurality of different types of attached electrical apparatuses.

9. The wireless apparatus of claim 8 , wherein the identity of the attached electrical apparatus is obtained from identity data conveyed via a communications channel through one of the first and second electrical circuits.

10. The wireless apparatus of claim 1 , further comprising:
at least one printed circuit board (PCB) accommodating the first and second electrical circuits.

11. The wireless apparatus of claim 10 , comprising:
a firewall located at a top of the chassis and providing a ground connection between the at least one PCB and the chassis within a predetermined distance of the electrical connector.

12. The wireless apparatus of claim 11 , wherein the firewall is configured to prevent the chassis from forming a waveguide at one of the first and second frequency bands.

13. The wireless apparatus of claim 1 , wherein the first electrical circuit comprises a transmitter operational within the first frequency band.

14. The wireless apparatus of claim 1 , wherein the second electrical circuit comprises a transceiver operational within the second frequency band.

15. The wireless apparatus of claim 1 , wherein the antenna comprises a dipole antenna.

16. The wireless apparatus of claim 1 , wherein the attached electrical apparatus comprises a microphone, and wherein the attached electrical apparatus is configured to provide an audio signal to the wireless apparatus through a second component of the electrical connector.

17. The wireless apparatus of claim 1 , wherein the first and second electrical circuits are configured to operate simultaneously.

18. A wireless microphone system comprising:
a wireless transmitter comprising:
a first electrical circuit configured to process a first radio frequency (RF) signal within a first frequency band;
a second electrical circuit configured to process a second RF signal within a second frequency band; and
a chassis accommodating the first and second electrical circuits, wherein an electrical ground of the first and second electrical circuits are electrically connected to the chassis, and wherein the chassis is configured to operate as a first portion of an antenna of the wireless transmitter;

a microphone comprising a housing, wherein the housing is configured to operate as an enclosure of the microphone and as a second portion of the antenna of the wireless transmitter; and
an electrical connector configured to enable communication, between the microphone and the wireless transmitter, of a combined RF signal comprising the first RF signal and the second RF signal.

19. The wireless microphone system of claim 18 , further comprising:
a combining circuit having first and second ports operational only at the first and second frequency bands, respectively, and a third port operational at both the first and second frequency bands,
wherein the first and second electrical circuits electrically connect to the first and second ports of the combining circuit, respectively,
wherein the third port of the combining circuit electrically connects to a first component of the electrical connector, and
wherein the first component of the electrical connector electrically connects to the housing of the microphone.

20. The wireless microphone system of claim 19 , further comprising:
a matching circuit, wherein the third port of the combining circuit connects to the first component of the electrical connector through the matching circuit and provides a predetermined degree of impedance matching between the combining circuit and the antenna; and
a control circuit configured to configure at least one electrically tunable element of the matching circuit based on an identity of the microphone, wherein the microphone is one of a plurality of different types of microphones.

21. The wireless microphone system of claim 18 , wherein the antenna comprises a dipole antenna.

22. The wireless microphone system of claim 18 , wherein the first and second electrical circuits are configured to operate simultaneously.

23. The wireless microphone system of claim 18 , wherein the wireless transmitter is configured as a wireless transceiver for wireless transmission and wireless reception.

24. An antenna configured for operation at both a first frequency band and a second frequency band, wherein the antenna comprises:
a chassis of a wireless apparatus, wherein the chassis supports a first portion of the antenna, and wherein the chassis is configured to accommodate:
a first electrical circuit configured to process a first radio f

Assignees

• Shure Acquisition Holdings Inc

Inventors

• Celebi Adem
• Kenkel Mark Allen
• Wang Tracy
• Ma Zhen

Classifications

• H04B1/0057 Primary

  using diplexing or multiplexing filters for selecting the desired band · CPC title

• H01Q1/2291

  used in Bluetooth® or Wi-Fi® devices of Wireless Local Area Networks [WLAN] (H01Q1/241 takes precedence; WLAN in general H04W) · CPC title

• H01Q5/48 Primary

  Combinations of two or more dipole type antennas · CPC title